Zipp 303 Firecrest Carbon Tubeless 650b Disc Brake Rear Wheel Engineered to provide durable, lightweight performance across road, gravel and more, the Zipp 303 Firecrest Carbon Tubeless 650b Disc Brake Rear Wheel features a state-of-the-art carbon construction to enhance lateral stiffness. Available in a 650b format, this wheel provides room for larger, 28mm+ tyres to boost compliance, traction and comfort. Not only is the dimpled finish aesthetically pleasing, but it gifts the user with unhindered speed. Known as Advanced Boundary Layer Control, this unique pattern smooths airflow across the surface of the rim, allowing the wheel to cut through the air with ease. The tubeless design allows for reduced pressures to be run, boosting grip without the risk of pinch punctures. The ZR1 DB hub keeps this wheel running smoothly for longer, and features an enhanced seal design to prevent bearing corrosion from water ingress. 66 points of engagement allow for snappy acceleration off the line, offering a positive feel free from unwanted slack. Includes Zipp 303 Firecrest Carbon Tubeless 650b Disc Brake Rear Wheel 12mm hub end caps Center Lock lock ring Highlights A wheel that combines aerodynamics, low rolling resistance, low weight, lateral stiffness, strength and comfort for a multifaceted performance The full carbon rim is constructed from the finest materials to promote a high stiffness to weight ratio 45mm rim depth offers performance in any riding situation AeroBalance derived rim profile simultaneously lowers drag, improves crosswind stability and provides a turbulence reducing rim-to-tyre junction ABLC dimples smooth the airflow across the rim’s surface to further lower drag Wide, 25mm internal rim width reduces tyre rolling resistance, improves comfort and enhances cornering grip The hookless rim is designed with Tubeless Made Easy technology to take advantage of and ease the installation of tubeless tyres as well as smoothing the rim-to-tyre interface for lower drag A low overall weight promotes enhanced climbing and acceleration ZR1 DB hub is German engineered, Center Lock compatible, has super smooth bearings, durable seals and a 66 point freehub engagement for enhanced pedalling response Sapim CX-Sprint spokes and neat lacing patterns provide even tensions and a durable build Please note: The Zipp 303 Firecrest is designed for use with tubeless-ready tyres only