Utilising Zipp’s finest advances including Firecrest® shaping, Carbon Clincher technology, signature ABLC™ rim dimples and the advanced 88 hub, the 303 squeezes every opportunity to maximise its number one weapon: speed.
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.
88 Hub Technology
Every aspect of Zipp’s 88 hub sets a new benchmark. The standard steel bearings are the roundest in the industry. The 17mm axle is the stiffest of any road hub Zipp has tested.
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.
• Weight: 685g
• Hub Used: 88
• Rim Depth: 45mm
• Brake Track Width (centre): 26.40mm
• Max Width: 28.50mm
• Clincher Bead Width: 17.25mm
• Spoke Count: 18
• Spoke Pattern: Radial
• Spoke Length: 260mm
• Max Tire Pressure: 125psi
• Max Tire Pressure: 8.62bars
• Track Adaptable: Yes
• Dimpled Surface: Yes
• Ceramic Bearing: Aftermarket
• External Nipples: Yes