CRW CS4045 II Wheelset

Product Overview

Lighter. Wider. More Reliable. The all‑rounder evolved.

The CRW (Craft Racing Works) CS4045 II is the second‑generation evolution of one of the most critically acclaimed carbon disc‑brake wheelsets on the market. Featuring a 40mm front and 45mm rear combination, it delivers the perfect balance of lightweight climbing performance and aerodynamic efficiency—making it the ultimate all‑round wheelset for road racing, gran fondos, and fast group rides.

The 2026 version refines an already winning formula: 40g lighter, wider rims, and a tuneable bearing preload system. At just 1140g for the pair, these are weights that were inconceivable for disc brake wheels just a few years ago.

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Key Features

🏆 Class‑Leading Lightweight

• 1140g ± 2% for the pair

• 40g lighter than the previous generation

• Among the lightest disc brake wheelsets in its class

📐 Optimised Front‑Rear Profile

• 40mm front rim – responsive steering and excellent crosswind stability

• 45mm rear rim – enhanced aerodynamic efficiency and cruising inertia

• The ideal all‑rounder for mixed terrain and racing

🎯 Wider Rims – More Comfort, More Grip

• 24mm internal width – front and rear

• 31.6mm external width – front and rear

• Allows lower tyre pressures for improved comfort, grip, and reduced risk of rim damage

• Recommended tyre width: 25–32c

⚡ Full Carbon Spokes

• Aero blade carbon spokes for reduced rotational mass

• Lightning‑fast acceleration and responsive power transfer

• "Accelerates crazy fast" – direct and stiff when laying down the power

🔧 Second‑Generation Hub Design

• Bolt‑connected hub and spokes – creates a rigid, unified assembly for substantially improved overall stiffness

• TPI ceramic bearings for ultra‑smooth rolling efficiency

• 36‑tooth star ratchet – immediate pedal engagement

• Tuneable bearing preload – allows fine‑tuning of clearance for optimal performance and extended bearing life

🎨 Premium Finish

• UD paintless finish – clean, professional aesthetic

• Choice of Black or White decals

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Specifications

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What's New in the 2026 Version

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What Riders Are Saying

"A wheelset that accelerates crazy fast, absorbs road imperfections better than its carbon‑spoked rivals and still feels direct and stiff when laying down the power." — Tay Junction

"The CS4045 wheels mounted right onto the bike without needing any adjustment to either the brake calipers or rear derailleur. I experienced absolutely no brake rub or gear indexing issues." — WeightWeenies Forum

"4045款轻咗40g～变咗1140g咋！劲呀！" — Xiaohongshu

"CS4045仅1140g的重量，前40后45的搭配拥有良好的操控性能，在爬坡比赛中也能够维持功率输出。" — Xiaohongshu

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What's in the Box

• CRW CS4045 II Wheelset × 1 pair (Front + Rear)

• Tubeless tape (pre‑installed)

• Ultra‑light disc lockrings

• User manual

Tyres, rotors, and cassettes sold separately.

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Technical Notes

⚠️ Max System Weight: 100kg (rider + bike + bags)

⚠️ Tyre Selection: 25–32c recommended – wider rims allow lower pressures for improved comfort and grip

⚠️ Brake Compatibility: Disc brake only (Center Lock) – not compatible with rim brakes

⚠️ Freehub Choice: Please confirm HG (Shimano) or XDR (SRAM) when ordering

⚠️ Bearing Preload: Factory preset for 10–12 Nm thru‑axle torque. Adjustable if needed