XDS X-LAB AD8 – Shimano 105 Di2 24-Speed Road Bike (C45UL Wheelset)

Product Overview

WorldTour DNA. Real-world accessibility. The pure racing machine refined for everyday roads.

The XDS X-LAB AD8 is a performance-focused aero road bike engineered to bring race-proven speed and modern technology to a wider range of riders. Inspired directly by the WorldTour-tested AD9 platform—the bike raced by Team XDS Astana at the highest level of professional cycling—the AD8 shares the same frame design and geometry, delivering elite aerodynamic efficiency and responsive handling in a package built for serious cyclists.

Constructed from Toray T800 carbon fibre, the AD8 strikes the ideal balance between low weight, stiffness, and ride responsiveness. The carbon layup has been carefully tuned to provide the sharp acceleration and efficient power transfer expected from a modern aero race bike, while maintaining enough compliance for comfort across long training days and demanding road surfaces. Built for riders who measure success in watts, speed, and progression, the AD8 delivers aerodynamic gains that can be felt in real-world riding.

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Key Features

🏆 WorldTour Geometry – Same as the AD9

• Same frame design and geometry as the WorldTour-proven AD9—speed doesn't need reinvention

• Aggressive angles, a low front end, and a responsive rear triangle deliver razor-sharp handling and optimal power transfer

• Race-ready geometry ensures maximum efficiency and control, whether attacking climbs, cornering at speed, or launching a sprint finish

• Proven by Team XDS Astana at the highest level of professional racing

⚡ Toray T800 Carbon Frame – Lightweight & Stiff

• Toray T800 carbon fibre construction—the ideal balance of lightweight, stiffness, and durability

• Frame weight: 950g (Size M)

• Streamlined seat tube, fork, and seatstays let the frame slip through the air, conserving watts

• Full hi-mod carbon aero frameset with clean, integrated aesthetics

🚀 Advanced Aerodynamics – CFD + Wind Tunnel Engineered

• CFD and wind tunnel engineered aerodynamics for ultra-low drag performance

• Aero frame shape borrowed from the AD9 with a streamlined seat tube, fork, and seatstays

• Dropped seat stays and internal cable routing reduce drag while keeping the design clean and modern

• Fully integrated cockpit completes the race-ready setup

⚙️ Shimano 105 Di2 Electronic Shifting – 24-Speed Precision

• Full Shimano 105 Di2 12-speed electronic groupset—the gateway to pro-level electronic performance

• Shimano 105 ST-R7170 Di2 shifters and FD-R7150/RD-R7150 Di2 derailleurs

• Semi-wireless architecture with lightning-fast, precise gear changes

• Shimano 105 CS-R7101 cassette with 11-34T range

🔬 Branta Carbon Power Meter Crankset – Train Smarter

• Branta carbon fibre crankset with integrated power meter—track your effort on every ride

• 52-36T chainrings with 29mm alloy spindle

• Apple Find My anti-theft technology integrated into the crankset—an extra layer of security and modern connected convenience

🛞 Branta C45 UL Carbon Wheelset – Ultra-Light & Aero

• Branta C45 UL carbon wheelset with carbon bladed spokes—just 1,330 grams for the pair

• 45mm deep-section rim balances aerodynamic efficiency with climbing agility

• 22mm internal / 30mm external width—optimised for modern 28c tyres

• Enhances acceleration, climbing response, and overall ride feel

🛑 Shimano 105 Hydraulic Disc Brakes

• Shimano 105 BR-R7170 hydraulic disc brakes with Shimano SM-RT70 rotors

• 160mm front / 140mm rear for confident, consistent stopping power

🔧 Fully Integrated Cockpit

• Branta Carbon Integrated Handlebar/Stem—superlight one-piece design

• Fully internal cable routing for a clean, aerodynamic front end

• Note: The internal routing is optimised for the included Branta one-piece handlebar, so using your own bar/stem is not seamless

🛠️ Modern Standards – Built for the Future

• UDH (Universal Derailleur Hanger) compatible—future-proof for SRAM Full-Mount derailleurs

• T47 86mm threaded bottom bracket—creak-free, easy to service, and compatible with modern power meter cranks

• Max tyre clearance: 32mm—run high-volume tyres for comfort and speed

🪑 Premium Finishing Kit

• Selle Italia SLR Boost saddle with carbon rails—race-proven comfort and lightweight performance

• XDS Carbon Aero Seatpost—optimised for aerodynamic efficiency

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Specifications

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Geometry & Sizing

Sizing to be used as a reference only. Please check with a local authorised XDS dealer to determine the correct size.

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What's in the Box

• XDS X-LAB AD8 Complete Bike × 1

• XDS Carbon Frame (Toray T800, UDH compatible)

• XDS Carbon Fork (Toray T800, 100x12mm Thru-Axle)

• Shimano 105 Di2 12-Speed Electronic Groupset

• Branta Carbon Power Meter Crankset with Apple Find My

• Branta C45 UL Carbon Wheelset (Front + Rear)

• Michelin Pro 5 700x28C Tyres × 2

• Branta Carbon Integrated Handlebar/Stem

• XDS Carbon Aero Seatpost

• Selle Italia SLR Boost Saddle (Carbon Rails)

• Tubeless valves and sealant (pre-installed)

• Pedals not included

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What Riders Are Saying

"The ride quality impressed me. The frame has a noticeable level of compliance, absorbing road buzz effectively without dulling feedback. Even over rougher patches, there was no unwanted chatter. The handling was confident—stable and direct when I needed it, but with a lively, snappy feel on demand. For an aero frame, XDS has done well to keep the weight down; it never felt sluggish on the climbs and held its own in surges." — Urban Pedaler Ride Review

"The AD8 is a very stiff, tap-the-pedal-and-GO bike." — Escape Collective Community

"At $4,500 retail, it is not merely affordable by modern aero bike standards. It is one of the few bikes at this price that makes a serious attempt to deliver the full superbike experience, rather than a stripped-down lookalike." — EGL Tours

"This bike comes with a carbon wheelset, electronic shifting, a power meter, and a one-piece cockpit. The level of included equipment is not normal at this price." — Bicycling Magazine

"Race bike feel and handling. 16.6 lbs complete bike weight is quite good for an aero bike with 105 Di2. High quality paint and finish." — EGL Tours Pros

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Why Choose the XDS X-LAB AD8?

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Common Questions

Q: Is the handlebar replaceable?

A: The internal cable routing is specifically optimised for the included Branta one-piece handlebar. Using a different bar/stem combo is possible but will not be seamless and is not recommended.

Q: What bottom bracket standard does the AD8 use?

A: T47 86mm threaded—creak-free, easy to service, and compatible with 24mm and 29mm cranks.

Q: What is the maximum tyre clearance?

A: The AD8 fits tyres up to 32mm.

Q: Does the bike include a power meter?

A: Yes—the Branta carbon crankset features an integrated power meter with Apple Find My anti-theft technology.

Q: Is the AD8 UCI compliant?

A: Yes—XDS conducts extensive testing to ISO and ASTM standards, and the frame is UCI compliant.

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Technical Notes

⚠️ Pedals: Not included — purchase separately according to your preference

⚠️ Cockpit: The fully internal cable routing is optimised for the included Branta one-piece handlebar. Using your own bar/stem is not seamless

⚠️ Geometry: The AD8 is optimised for performance and speed—it is less suited for ultra-endurance events

⚠️ Wheelset: Ships with Michelin Pro 5 700x28C tyres. Tubeless setup may require sealant refreshment

⚠️ Bottom Bracket: T47 86mm / 29mm — threaded, compatible with 24mm and 29mm cranks

⚠️ UDH: Compatible with SRAM Universal Derailleur Hanger for precise shifting and future-proof compatibility

⚠️ Warranty: Lifetime warranty on frame, fork, and carbon wheelset

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About XDS and X-LAB

XDS is one of the world's largest bicycle manufacturers, with decades of carbon fibre expertise producing bikes for major Western brands. X-LAB is XDS's performance brand—the equivalent of S-Works to Specialized—created to take on the best road bikes on the market. The AD8 shares the same frame design and geometry as the flagship AD9, raced by the XDS Astana UCI WorldTour team. From the same factory that builds championship-winning bikes, the AD8 brings WorldTour-level performance to a wider range of riders.