Zipp 404 Carbon Clincher Front Wheel (QR) 2019

Zipp 404 Carbon Clincher Front Wheel QR. This Zipp 404 Front Wheel performs wonderfully in any situation where speed and stability are the top priority. Extensive research and development has shown how the 404 Firecrest front wheel's depth and shape performs superbly in all conditions. This wheel is an exceptional option for breakaways, sprints and summit finishes, as well as triathlon distances. This wheel boasts versatility, a lightweight construction and aerodynamic finesse Optimised for Aerodynamic Performance. Featuring precision engineered hubs and Firecrest's depth of knowledge, this front wheel has been designed to specifically account for differences in airflow patterns between clincher and tubular tyres, and successfully surpasses the aerodynamic performance of every other clincher wheel design in its class Exceptional Crosswind Performance. Deep section rims have a reputation of being hard to handle in crosswinds, but the Zipp 404 Firecrest has shattered this reputation through first class engineering. This front wheel provides smoothly predictable and fully stable handling in crosswinds so you can remain in the aero position and keep your power output to the maximum; its design is purely focused on helping you to deliver your highest possible performance output. The braking performance on this Zipp 404 Firecrest is also improved, providing a strong yet smooth initial bite when you need to scrub off a little speed for a technical corner Features Hub Model77 Rim Outer Width25mm Rim Internal Width16 5mm RimCarbon Clincher Rim Depth58mmRim Dimple SurfaceABLC Sawtooth SpokesSapim CX Sprint Spoke Hole Count18 Hole Spoke PatternRadial Spoke Length248mm Max Tyre Pressure125 psi NipplesSapim, External Weight710gTechnologies Showstopper Showstopper 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 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 SawTooth The name given to the Zipp NSW variable depth 5358mm rim profile. This design is the result of rigorous wind tunnel and real world testing. The rim shape takes natures elegant design solutions and combines their precise engineering finesse to deliver a wheel that performs like nothing else before. Firecrest A unique to Zipp rim profile that provides more aerodynamic finesse than any other rim design. It also improves handling in crosswinds significantly and increases the ride quality enormously. 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. Wire EDM Electron Discharge Machining allows Zipp to precisely remove internal material from the rear hub after they have been heat treated. This removes any abnormality that can sometimes occur during the heat treating process, resulting in perfectly finished hub shell BuyZipp Wheels & Tyresfrom Chain Reaction Cycles, the World's Largest Online Bike Store.