Fulcrum Speed 40C and 55C Clincher Road WheelsetStringently researched to help you achieve the speediest and most efficient run to the finish line, this formidable Fulcrum wheelset features different depths on each rim to keep you upright and unrivalled in every racing situation. Measuring a 40mm profile on the front and 55mm on the rear, each of the full carbon rims gives a professional-level feel when dealing with crosswinds, pace changes and fast, winding routes. Fast-Paced and Well-Balanced Road Wheelset The carbon-construction and “Twill” finish on the rim ensures superb stiffness and top-notch handling as you take it to the tarmac, with the overall wheel structure strengthened by the stainless-steel spokes and durably-made hubs. With USB ceramic bearings, the carbon front hub and aluminium rear hub ensure a super-smooth spin on every road-riding terrain, with the rear model also housing a Shimano 9/10/11-speed-compatible freehub for added thrust. The addition of rim brake compatibility to this lightning-quick wheelset gives excellent stopping power and control to every rapid road run. This dynamically-deep set of high-performance wheels is an essential choice for the fast and focused racer. Features: Rim Material: Full Carbon, “Twill” Carbon-Fibre finish Rim Depth: Front: 40mm; Rear: 55mm Brake Type: Rim Brake Spoke Type: Stainless-Steel, double-butted, aero, straightpull Spoke Count: Front: 18; Rear: 21, 2:1 lacing Hub Material: Front: Carbon with Aluminium flanges; Rear: Aluminium with Aluminium flanges Freehub: Shimano 9/10/11-speed Axle Compatibility: Front: QR, Rear: QR, AluminiumBuy Fulcrum Wheels & Tyres from Chain Reaction Cycles, the World’s Largest Online Bike Store.