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Zipp 303 Firecrest Carbon Clincher Rear Road Wheel (Sram/Shimano 11) Beyond Black 2015

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Description
Improved again with the updated 188 rear hub, the 303 continues to evolve as one of the premier wheels on the market. It’s no wonder why riders around the globe are scrambling to get their hands on some. With wins in the Tour de France, Paris-Roubaix, the Tour of Flanders and more, it is a proven performer on the elite stage and brings with it exceptional ride quality that riders of all levels will appreciate. Carrying it to multiple victories, the trinity of speed, light weight, and utter reliability have been proven in pro cycling’s most demanding races.

Utilising Zipp’s finest advances including Firecrest® shaping, Carbon Clincher technology, signature ABLC™ rim dimples and advanced V9 hub, the 303 squeezes every opportunity to maximise its number one weapon: speed.


Firecrest technology
Firecrest rims have a near-constant width from brake track to spoke bed to improve aerodynamics and better control airflow. Zipp have used Computational Fluid Dynamics software analysis to maximize aerodynamics and minimize wind-produced torque, resulting in a 202 Firecrest Carbon Clincher that is faster and better handling than a classic road wheel. The Firecrest rim shape improves stability by moving the wheel’s centre of pressure to sit almost directly over the steering axis, where wind-produced steering torque has a minimal effect.

Carbon Clincher technology
Zipp’s exclusive resin, based on materials used in motorsports braking systems, effectively tolerates the incredible spikes in heat caused by braking to provide you with reliability and stopping power.

Advanced Boundary Layer Control (ABLC)
Advanced Boundary Layer Control (ABLC) refers to the patented and instantly recognizable dimpled pattern found on all of our carbon rims. ABLC smoothes airflow across the rim's surface and is tailored to every model from the 202 to the Super-9 Disc. The third-generation of ABLC has up to four times more dimples than before.

VCLC™ (Visco-Elastic Constrained Layer Control)
Visco-Elastic Constrained Layer Control (VCLC) uses a vibration-absorbing material sandwiched between layers of rigid carbon laminate in the rim. When the wheel receives an impact from the road, much of the shock is absorbed by the VCLC system, delivering a 10% reduction in vibration.

188 Hub Technology
Bearings: Larger Swiss steel bearings with a custom cartridge increase durability by more evenly spreading load over the axle.
Lacing: New “virtual 3 cross” lacing on both sides of rear wheel for improved stiffness, achieving 3 cross stiffness in a two cross pattern with a new spoke geometry.
Stiffness: The 188/V9 has 25 percent more torsional stiffness than a leading competitive hub. This measure of stiffness is crucial for the direct power transfer to the rear wheel for out-of-the saddle sprints and climbs. The new hub also is laterally (side-to-side) stiffer than its rival or predecessor. 


Wire EDM
Electron Discharge Machining allows Zipp to cut the materials for their rear hub drive internals after they’ve been hardened through heat treating, negating the warping and imprecision caused by the heat-treating process.

Steel Bearings
Zipp is the only company specifying Swiss made highly specialized ball bearing cartridges. Working with a family owned Swiss bearing manufacturer, Zipp is able to attain a superior level of bearing smoothness and long life. Zipp ball bearings are specified to 10 millionths of an inch tolerance, guaranteeing that they are at least 2.5 times rounder and better matched than most company’s “high precision” balls, and more than five times tighter than most “precision” balls.
Features
• Max recommended rider weight: 113kg
• Weight: 855g
• Hub Used: 188/V9
• Rim Depth: 45mm
• Brake Track Width (centre): 26.40mm
• Max Width: 28.50mm
• Clincher Bead Width: 17.25mm
• Spoke Count: 24
• Spoke Length (Non-Drive): 264mm
• Spoke Pattern (Non-Drive): 2 cross
• Spoke Pattern (Drive): 2 cross
• Spoke Length (Drive): 262mm
• Max Tyre Pressure: 125psi
• 11-speed compatible hub: Yes
• Sram/Shimano compatible
• Track Adaptable: No
• Dimpled Surface: Yes
• Ceramic Bearing: Aftermarket
• External Nipples: Yes
SKU# 00.1918.138.002
Package ID: Oversize