Zipp 808 Firecrest Carbon Road Wheelset

. When speed junkies and engineers work together to design a wheelset, nobody would have expected the result to be as successful as Zipp's 808 Firecrest clinchers. Featuring ultra deep 82mm carbon rims, these wheels use their sharp aerodynamic profile and low weight to build speed at an astounding rate. Plus, with Zipp's ABLC Sawtooth technology in the rim surface, these wheels have an added stability that ensures maximum performance even in tough crosswinds Excellent Hubset Durability. This wheelset comes complete with Zipp's 77177 hubset, which has been designed to optimise spoke tension and provide excellent bearing protection, meaning increased durability and a stronger power transfer Features Hubs 77177 Rim MaterialCarbon Rim Width Internal17mm Rim Width Outer26mm Rim Depth82mm TypeClincher Max Tyre Pressure125 psi Dimple SurfaceABLC Sawtooth Technology Brake InterfaceRim Brake Spoke Count18 front,24 rear Spoke TypeSapim CX Ray Spoke Lacing Pattern2 Cross NipplesSapim Secure Lock Weight 830g front, 1kg rearTechnology Hexfin 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 ClincherTwo years of intensive prototyping and testing has resulted in a clincher that utilises elements of motorsports brake systems to maximise heat management. Their investment has paid off in spades, with all Zipp Carbon Clinchers now passing the rigorous safety standards of CEN. 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 an impact from the road, a lot of the shock is absorbed by the VCLC system, resulting in a 10% reduction in road vibration. 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 has introduced a moulded in groove specifically tuned for the Zipp Tangente Platinum Pro EVO Brake Pad. The grooves have been optimized to interact with 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 BuyZipp Wheels & Tyresfrom Chain Reaction Cycles, the World's Largest Online Bike Store.