The perfect do it all disc road & gravel rim. Zipp's 40mm deep 303 rim is equally at home on rolling road rides or gravel. Pair them Chris King R45D, White industries CLD, ONYX Vesper or Industry Nine Road Disc hubs using Sapim CX Ray bladed spokes.

The Rim:

Zipp’s 303 Firecrest® Tubeless Disc-brake wheelset is designed for the real world… a world of imperfect conditions, road surfaces, and elements where the bottom line is simple. Efficiency = speed. It’s faster, lighter, and more capable over varied terrain—whether the surface is pavement in all its conditions or no pavement at all.

Deeply rooted in Zipp’s drive to conquer the Spring Classics, the new 303 Firecrest is remade with a purpose-made approach for the demands of modern road bikes. When it comes to going fast on a bicycle, efficiency means reduced: Wind resistance, rolling resistance, rider fatigue, weight.

The 303 Firecrest Tubeless Disc-brake was designed using real-world direct measurements (vs. primarily wind tunnel or computer simulation). The results were huge. Its rim is slightly more bulbous in design than its predecessor, with a 30mm outside width, a 25mm internal width, and a 40mm rim depth. The profile provides low drag and an improved transition between rim and tire, boosting aero efficiency on the road. The wide rim stance also features less tire deflection for reduced rolling resistance.

The combination of the wider tire, increased tire volume, and lower tire pressure helps to reduce rider fatigue by smoothing out the ride over imperfect pavement and road conditions—the tire and wheel system absorbs the shaking, not the rider.

Rim Features.

• Zipp graphics and cosmetic identity that scream speed
• Versatile endurance wheelset for the modern road bike with tubeless and hookless rim profile
• Lighter Weight than its predecessor, making it nimble and fast.
• Tubeless Made Easy, optimized tire bed sign allows for simple tool-free installation and removal with no need for an air compressor to seat the tire.
• Ultra-wide 25mm rim profile creates a better tire interface to be fast on or off the road
• New 40mm rim depth makes a light and aero wheel in every situation.

Rim Specifications.