{"product_id":"shimano-ultegra-cs-r8101-12-speed-cassette","title":"Shimano Ultegra CS-R8101 12-Speed Cassette","description":"\u003ch2\u003e\u003cspan class=\"\"\u003eProduct Overview\u003c\/span\u003e\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eHyperglide+ performance. Ultegra refinement. The sweet spot of Shimano's 12-speed range.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThe Shimano Ultegra CS-R8101 is the 12-speed cassette from Shimano's legendary Ultegra R8100 series—the groupset trusted by enthusiasts, weekend warriors, and competitive amateurs worldwide. Engineered to deliver nearly identical performance to flagship Dura-Ace at a significantly more accessible price point, this cassette represents the\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e\"sweet spot\" in Shimano's 12-speed ecosystem\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eWhether you're sprinting for the line, grinding up alpine climbs, or chasing a personal best on rolling terrain, the CS-R8101's Hyperglide+ technology delivers seamless, lightning-fast shifts—even under maximum pedalling force\u003c\/span\u003e\u003ca href=\"https:\/\/bike.shimano.com\/en-NZ\/products\/components\/pdp.P-CS-R8101-12.html\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan class=\"\"\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e⚡ Hyperglide+ Technology – Revolutionary Shifting Performance\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSeamless shifts both up and down the gear range\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e– technology that revolutionised off-road shifting is now transforming road cycling\u003c\/span\u003e\u003ca href=\"https:\/\/bike.shimano.com\/en-NZ\/products\/components\/pdp.P-CS-R8101-12.html\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eShift without backing off\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e– even during maximal efforts up a climb or racing a friend, riders no longer need to ease up to perform a shift\u003c\/span\u003e\u003ca href=\"https:\/\/bike.shimano.com\/en-NZ\/products\/components\/pdp.P-CS-R8101-12.html\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e1\/3 faster shifting\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ecompared to 11-speed Shimano groupsets\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSmooth shifting even when standing on the pedals\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e🎯 Refined 12-Step Gear Combination\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eAvailable in\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003etwo gear ratios\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eto suit your terrain:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e11-30T\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: 11-12-13-14-15-16-17-19-21-24-27-30T\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e11-34T\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e: 11-12-13-14-15-17-19-21-24-27-30-34T\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFirst eight cogs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e– closely spaced for natural, comfortable progression\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eProvides\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003epeak efficiency and accelerating performance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efor every racing situation\u003c\/span\u003e\u003ca href=\"https:\/\/bike.shimano.com\/en-NZ\/products\/components\/pdp.P-CS-R8101-12.html\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e🔧 Premium Construction\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e12 steel sprockets\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ewith\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003enickel-plated finish\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efor hard-wearing corrosion resistance\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e2 lightweight aluminium spider arms\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003efor reduced weight and increased rigidity\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAnodised aluminium lockring\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eincluded\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRefined evolution\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eof the 12-speed road cassette\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e🛞 Universal Freehub Compatibility – Upgrade Without Hassle\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCompatible with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eboth SHIMANO 12-speed and 11-speed road freehub bodies\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/www.trekbikes.com\/us\/en_US\/equipment\/cycling-components\/bike-cassettes-freewheels\/shimano-ultegra-r8101-12-speed-bicycle-cassette\/p\/47122\/?colorCode=greylight\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLarger driving cogs\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003emaximise drivetrain efficiency while retaining compatibility with existing Hyperglide freehub bodies\u003c\/span\u003e\u003ca href=\"https:\/\/www.trekbikes.com\/us\/en_US\/equipment\/cycling-components\/bike-cassettes-freewheels\/shimano-ultegra-r8101-12-speed-bicycle-cassette\/p\/47122\/?colorCode=greylight\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003ePerfect for upgrading existing 11-speed bikes to 12-speed\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e🏆 Unbeatable Value\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eNearly identical performance\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eto Dura-Ace at a significantly more accessible weight-to-price ratio\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e\"sweet spot\"\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003ein Shimano's 12-speed ecosystem\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eA\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003egood compromise between efficiency, weight and price\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eSpecifications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eSpecification\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003e11-30T\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003e11-34T\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eModel No.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCS-R8101-12\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eCS-R8101-12\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSpeeds\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e12\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e12\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eType\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eHYPERGLIDE+\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eHYPERGLIDE+\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGear Teeth\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e11-12-13-14-15-16-17-19-21-24-27-30T\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e11-12-13-14-15-17-19-21-24-27-30-34T\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eAverage Weight\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e291g\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e345g\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSprocket Material\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eSteel (nickel plated)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eSteel (nickel plated)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSpider\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e2× aluminium spider arms\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e2× aluminium spider arms\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLockring\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eAluminium (anodised)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eAluminium (anodised)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSpline Type\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eHG spline L2 (ROAD 12-speed) + HG spline L (ROAD 11\/12-speed)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003eHG spline L2 + HG spline L\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eCompatible Chain\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eHG 12-speed\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eHG 12-speed\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSeries\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eUltegra R8100\u003c\/span\u003e\u003ca href=\"https:\/\/www.allterraincycles.co.uk\/products\/shimano-ultegra-cs-r8101-12-speed-cassette?pr_prod_strat=e5_desc\u0026amp;pr_rec_id=7c9a71cb4\u0026amp;pr_rec_pid=15062478717303\u0026amp;pr_ref_pid=8540006711586\u0026amp;pr_seq=uniform\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eUltegra R8100\u003c\/span\u003e\u003ca href=\"https:\/\/www.allterraincycles.co.uk\/products\/shimano-ultegra-cs-r8101-12-speed-cassette?pr_prod_strat=e5_desc\u0026amp;pr_rec_id=7c9a71cb4\u0026amp;pr_rec_pid=15062478717303\u0026amp;pr_ref_pid=8540006711586\u0026amp;pr_seq=uniform\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eCompatibility\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3\u003e\u003cspan class=\"\"\u003e✅ Compatible With:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eShift\/Brake Levers:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eST-R9250, ST-R9270 (Dura-Ace)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eST-R8150, ST-R8170 (Ultegra)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eST-R7120, ST-R7170 (105)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eST-RX820, ST-RX610 (GRX)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eST-R8060, ST-R9160, ST-R9180\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRear Derailleurs:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRD-R9250 (Dura-Ace)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRD-R8150 (Ultegra)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRD-R7150 (11-34T only)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRD-R7100 (11-34T only)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eRD-RX820 (11-34T only)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChains (Recommended):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCN-M9100 (XTR)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCN-M8100 (XT \/ Ultegra)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCN-M7100 (SLX \/ 105)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eCN-M6100 (Deore)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eGroupsets:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano Dura-Ace R9200 \/ R9270\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano Ultegra R8100 \/ R8170\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano 105 R7100 \/ R7150\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano GRX RX820\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFreehub Bodies:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSHIMANO 11-speed road freehub bodies\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eSHIMANO 12-speed road freehub bodies (HG L2)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eUltegra vs 105 vs Dura-Ace: Which Cassette Is Right for You?\u003c\/span\u003e\u003c\/h2\u003e\n\u003cdiv class=\"ds-scroll-area ds-scroll-area--show-on-focus-within ds-scroll-area--enabled _1210dd7 c03cafe9\"\u003e\n\u003cdiv class=\"ds-scroll-area__gutters\"\u003e\n\u003cdiv class=\"ds-scroll-area__horizontal-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"ds-scroll-area__vertical-gutter\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eCS-R8101 (Ultegra)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eCS-R7101 (105)\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan class=\"\"\u003eCS-R9200 (Dura-Ace)\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight (11-30T)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e291g\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e361g\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e223g\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eWeight (11-34T)\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cstrong\u003e\u003cspan class=\"\"\u003e345g\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e—\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e253g\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSpider Arms\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e2× aluminium\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e1× aluminium\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e2× carbon\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLockring\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eAluminium\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eSteel\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eAluminium\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eTitanium Gears\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eNone\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003eNone\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e5-6\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFreehub Compatibility\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e11s \u0026amp; 12s\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan class=\"\"\u003e11s \u0026amp; 12s\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\n\u003cspan class=\"\"\u003e12s only\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBest For\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEnthusiasts \/ Best value\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eBudget-conscious riders\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eRacers \/ Ultimate performance\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eWhat Riders Are Saying\u003c\/span\u003e\u003c\/h2\u003e\n\u003cblockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003e\"Good cassette... A good compromise between efficiency, weight and price. High-quality product. Ideal resistance for climbers.\"\u003c\/span\u003e\u003c\/em\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e—\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMantel Customer\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cblockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003e\"Great shifting performance, high shifting speed and smooth shifting even when you're standing on the pedals.\"\u003c\/span\u003e\u003c\/em\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e—\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMantel\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cblockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003e\"Just fitted before I embarked on a French Alpine trip. Made life much easier on the long climbs and the extra 4 teeth are making a great difference.\"\u003c\/span\u003e\u003c\/em\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e—\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDeporvillage Customer\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003cblockquote\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003e\"The CS-R8101 represents the 'sweet spot' in Shimano's 12-speed ecosystem, offering nearly identical performance to Dura-Ace at a significantly more accessible weight-to-price ratio.\"\u003c\/span\u003e\u003c\/em\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e—\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eEvo Cycles\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eWhat's in the Box\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano Ultegra CS-R8101-12 Cassette × 1\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003eShimano aluminium lockring × 1\u003c\/span\u003e\u003ca href=\"https:\/\/www.allterraincycles.co.uk\/products\/shimano-ultegra-cs-r8101-12-speed-cassette?pr_prod_strat=e5_desc\u0026amp;pr_rec_id=7c9a71cb4\u0026amp;pr_rec_pid=15062478717303\u0026amp;pr_ref_pid=8540006711586\u0026amp;pr_seq=uniform\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eTechnical Notes\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eFreehub Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eCompatible with both\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSHIMANO 11-speed and 12-speed road freehub bodies\u003c\/span\u003e\u003c\/strong\u003e\u003ca href=\"https:\/\/www.trekbikes.com\/us\/en_US\/equipment\/cycling-components\/bike-cassettes-freewheels\/shimano-ultegra-r8101-12-speed-bicycle-cassette\/p\/47122\/?colorCode=greylight\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eDerailleur Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eThe 11-34T version requires a\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003emedium or long cage rear derailleur\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e– check compatibility with your specific model (RD-R7150, RD-R7100, RD-RX820 support 11-34T)\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike-components.de\/en\/Shimano\/Ultegra-CS-R8101-12-12-Speed-Cassette-p91000\/?o=1000363150-silver-11-34\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eChain Compatibility:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eFor optimal performance, use with\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eSHIMANO HG 12-speed chains\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003e(CN-M9100 \/ M8100 \/ M7100 \/ M6100)\u003c\/span\u003e\u003ca href=\"https:\/\/productinfo.shimano.com\/ja\/spec\/road-cassette\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eInstallation:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eRequires a cassette lockring tool and chain whip. Torque lockring to\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003e40 Nm\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eMaintenance:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eNickel-plated finish offers corrosion resistance – clean regularly with degreaser\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cspan class=\"\"\u003e⚠️\u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eLifespan:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan class=\"\"\u003e\u003cspan\u003e \u003c\/span\u003eTypical lifespan 5,000–8,000km depending on riding conditions and maintenance\u003c\/span\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003e\u003cspan class=\"\"\u003eAbout Shimano Ultegra\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cem\u003e\u003cspan class=\"\"\u003eUltegra has long been the choice of serious amateur racers and enthusiasts who demand professional-level performance without the professional-level price tag. When developing the Ultegra R8100 series, Shimano took a holistic and 100% performance-oriented approach—because great speed means great responsibility\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan class=\"\"\u003e. Faster than ever before, the 12-speed groupset delivers unparalleled control and comfort anytime, anywhere—whether in an amateur race, on the hunt for a personal best, or on a companionable ride\u003c\/span\u003e\u003ca href=\"https:\/\/www.bike24.com\/p2729383.html?origin=PDP_related\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan class=\"\"\u003e. The CS-R8101 cassette embodies the \"Science of Speed\"—the pursuit of ultimate performance through advanced materials, precision engineering, and obsessive attention to detail\u003c\/span\u003e\u003ca href=\"https:\/\/www.allterraincycles.co.uk\/products\/shimano-ultegra-cs-r8101-12-speed-cassette?pr_prod_strat=e5_desc\u0026amp;pr_rec_id=7c9a71cb4\u0026amp;pr_rec_pid=15062478717303\u0026amp;pr_ref_pid=8540006711586\u0026amp;pr_seq=uniform\" rel=\"noreferrer\" target=\"_blank\"\u003e\u003c\/a\u003e\u003cspan class=\"\"\u003e.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003cp class=\"ds-markdown-paragraph\"\u003e\u003cstrong\u003e\u003cspan class=\"\"\u003eExperience Ultegra-level performance. Add the Shimano CS-R8101 to your cart today!\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"SHIMANO","offers":[{"title":"11-30T","offer_id":54147162079596,"sku":null,"price":600.0,"currency_code":"HKD","in_stock":true},{"title":"11-34T","offer_id":54147162112364,"sku":null,"price":600.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0980\/6210\/6988\/files\/ULTEGRAHYPERGLIDE_CASSETTE12s_5.jpg?v=1786085704","url":"https:\/\/watts-lab.myshopify.com\/products\/shimano-ultegra-cs-r8101-12-speed-cassette","provider":"WATTS LAB ","version":"1.0","type":"link"}