Zipp 303 Carbon Clincher QR Rear Wheel

. Packed to the brim with Zipp's innovative technologies, the 303 is an all carbon rear wheel clincher that's lightweight and responsive enough to suit riders of any skill level. A deep 45mm rim offers excellent aerodynamics while also being stiff enough to make for a smooth riding experience. Additionally, a wide rim of 26 4mm means better traction and power over rolling resistance, making this wheel more durable even on rough surfaces Fully Optimised Hubset. This wheel comes with Zipp's 177 hubset, a favourite of professionals for its ability to pair to with Sapim CX Sprint spokes to offer remarkable torsional stiffness, making for a stable performance that maintains speed for longer Easy to Install. This rear wheel also features an ergonomic quick release skewer, designed to fit neatly in the frame to aide with aerodynamics while also allowing for easy installation for your bike Features Hub Model177 RimClincher Rim Width26 4mm Rim Depth45mm Brake Track Width 26 4mm SpokesSapim CX Sprint Spoke Hole Count24 Hole Spoke PatternRadial Max Tyre Pressure125psi 8.62bars Dimpled SurfaceABLC SawTooth NipplesSapim Secure Lock Weight835gFeatures 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. ShowstopperShowstopper is a complimenting pairing of a directional, moulded in, texture with silicon carbide particles suspended in the surface resin. The current media blast process applied to all Zipp rims increases the surface roughness of the brake track providing the rider with consistent and responsive braking. In order to improve this for the wettest of rides, Zipp have introduced a moulded in groove specifically tuned for the Zipp Tangente Platinum Pro EVO Brake Pad. The grooves have been optimized to interact with the leading edge relative to the rotation of the wheel of the brake pad and the four cooling channels. The leading edge of the pad and first two channels efficiently wipe water and debris outward, cleaning and drying the braking surface, while the second two cooling channels have maximum interference with the grooves allowing greater braking force than a smooth rim. The cleaning effects of the groove and pad interaction improve brake feel and consistency even in dry conditions. 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 receives an 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 Worlds Largest Online Bike Store.