Zipp 808 NSW Carbon Tubeless Rear Wheel (QR) 2019

Zipp 808 NSW Carbon Tubeless Rear Wheel QR. The Zipp 808 NSW Carbon Tubeless Rear Wheel provides exceptional speed, power transfer and stability. Features an 82mm rim depth for sublime aerodynamics and thanks to the ABLC Sawtooth rim profile, it can handle crosswinds fantastically. Although this wheel provides phenomenal rolling performance, it delivers stability unmatched by any other wheel in this category Tubeless Ready, Better Rolling Performance, Grip and is Lighter. This wheel is fully ready to be setup to run tubeless tyres, which increases rolling performance and grip. A tubeless setup removes the need for an inner tube, which massively reduces the rotational mass of the wheel, providing faster response, instant power transfer and creates a much lighter, higher performing wheel. Features Rim Material Carbon Rim Width Internal 17mm Rim Width Outer 28 5mm Rim Depth 82mm Type Tubeless Ready Max Tyre Pressure 125 psi Dimple Surface ABLC Sawtooth Technology Brake Interface Rim Brake Spoke Count 24 Spoke Type Sapim CX Sprint Spoke Lacing Pattern 2 cross Nipples Sapim Secure Lock Bearing Type Cartridge Freehub 11 Speed Weight 998gTechnologies Cognition The ultimate in Zipp hub technology. Every time a conventional hub set starts to coast, friction within the freehub ratchet mechanism works like a drum brake to slow the rider down. The drag between hub shell and driver body during coasting is considered as efficiency loss, especially for road wheels. High drag also can significantly contribute to chain dropping issues. The drag torque drives the cassette clockwise so the chain gets loose on the load side. The solution The rear Cognition hub with AxialClutch technology reduces drag by disengaging the ratchet mechanism when coasting. It then uses magnets to re engage once the rider starts pedalling. 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. Hexfin 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. ImPress Zipps ImPress graphics technology prints graphics directly on the wheel, which allows the dimples to do what they were designed to achieve, to control vortex shedding and the rate at which air sheds off the wheel. Managing this is crucial to stability. ImPress graphics also give NSW a distinctive stealthy look. Buy Zipp Wheels & Tyres from Chain Reaction Cycles, the World's Largest Online Bike Store.