Zipp 404 Firecrest Tubular DB Rear Wheel 2019

Zipp 404 Firecrest Tubular D Rear Wheel. The Zipp 404 Firecrest Tubular DB Rear Wheel is one wheel that does it all, perfect for every riding situation that requires speed and powerful braking performance. Designed with a rim depth and profile that has been proven in all conditions, it is an ideal option for every triathlon distance, breakaways, sprints and hill finishes. The addition of being disc brake compatible means you can brake later when coming into corners, significantly improving your riding times overall Efficient and Durable. The Firecrest is a standard to which all other wheels are measured, its been a pro favourite for nearly three decades and has won many Grand Tour stages, International Triathlons and Ironman events. At the centre of this success is the Zipp 177D hub set with its exceptional durability, rolling efficiency and bearing life, with no pre adjustment needed; these hubs make every riding endeavour a hassle free experience meaning you can focus on the route ahead Competitive Stopping Power. The disc brake version of the 404 Firecrest compliments modern riding requirements where stopping power is a high demand. As riding is getting faster, routes are comprising of long winding descents through all weather conditions as rider competition gets fiercer; having the confidence to be able to stop and slow down competitively and safely is a major feature this wheel delivers Features Hub Model177D Brake StandardDisc Brake specific AxleQuick Release RimTubular Rim Depth58mm SpokesSapim CX Ray Spoke Hole Count24 Hole Spoke Pattern2 cross Spoke Length Drive Side260mm Spoke Length Non Drive Side258mm Max Tyre Pressure125psi 8.62bars Dimpled SurfaceYes Thru Axle Compatible Yes NipplesSapim Secure Lock External Nipples Yes SRAM XD R Driver Compatible Yes sold separately Weight835gFeatures Aerodynamic Boundary Layer Control ABLC The Sawtooth dimple design consists of 12 nodes that are specifically clocked to start aerodynamic shearing at a rate of 50hz at a rider speed of 20mph. Sawtooth accomplishes this by inducing small sheet vortices that shed at a low magnitude, but at a higher natural frequency, thus decreasing the laminar bubble effect on the aerodynamically shielded side of the rims profile to further reduce high yaw drag and improve crosswind stability. Carbon Bridge Adding Kevlar, stitched into a 6 bundle co axial thread and placing this at the rim edge allows Zipp to capstone the top of each outside diameter bridge, providing an improved way to distribute impact forces. This gives from 28% to as much as 50% improvements in impact depending on the rim type and allows Zipp to increase the lateral stiffness with minimal weight penalty. Visco Elastic Constrained Layer Control VCLC Using a vibration absorbing material that is compressed between layers of solid carbon laminate on the rim surface. This technology means that when the rim received as impact from the road, a lot of the shock is absorbed by the VCLC system, resulting in a 10% reduction in road vibration Buy Zipp Wheels & Tyres from Chain Reaction Cycles, the Worlds Largest Online Bike Store.