Zipp 404 Firecrest Tubular Disc Road Wheelset

. Zipp's 404 Firecrest wheelset can do it all, perfect for every riding situationthat requires speed and powerful braking performance, plus the versatility of clincher tyres. Designed with a rim depth and profile that has been proven in all conditions, these wheels are an ideal option for every triathlon distance, breakaway, sprint and hill finish. The addition of being disc brake compatible means you can brake later when coming into corners, significantly improving your riding times overall Disc Brake Compatible. This disc brake compatible version of these 404 Firecrest wheels compliment modern riding requirements where stopping power is a highdemand. As riding is getting faster, routes are comprising of long winding descents through all weather conditions and the competition has only gotten fiercer. Giving you the confidence to be able to stop and slow down competitively and safelyis a major feature this wheelset delivers Features Hub Model77D 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 CompatibleYes NipplesSapim Secure Lock External NipplesYes Weight710g front, 835g rearTechnology Aerodynamic Boundary Layer Control ABLCThe 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 BridgeAdding 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 VCLCUsing 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 BuyZipp Wheels & Tyresfrom Chain Reaction Cycles, the World's Largest Online Bike Store.