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Zipp 303 Firecrest Disc Clincher Rear Shim

The 303 Firecrest Carbon Clincher Disc-brake wheel combines innovative disc brake compatible technology with the credibility and heritage of one of Zipp's most acclaimed wheelsets, the 303 Firecrest. The 303 has been ridden to victory in multiple editions of the two toughest cobbled classics, Tour of Flanders and Paris Roubaix, as well as a multitude of cyclocross victories and even a mountainous Tour de France stage in wet, miserable conditions.

At the center of the 303 Firecrest Disc Carbon Clincher Disc-brake wheelset is a newly designed 11-speed compatible hub. Larger Swiss stainless steel bearings with a custom cartridge in the rear hub shell provide increased durability. The hub geometry and virtual 3-cross spoke-lacing pattern are optimized for reliability as well as exceptional stiffness, resulting in efficient power transfer and quick acceleration.

Perhaps the best wheel for the chaotic conditions of cyclecross, the Zipp 303 Firecrest Disc-brake wheelset is durable, lightweight and stiff while also providing the consistent and powerful performance of disc braking. Disc brakes deliver precision stopping with a light touch and greatly increased braking power for later braking and faster lap times. The 28mm width of the 303 make it great for deducing tire deflection even at low pressures creating a smoother and more stable ride whether you're doing cyclocross, gravel roads, steep descents or urban assaults.

Firecrest's signature shaping is designed to optimize both halves of the wheel and balance the center of pressure. This creates a 45mm sectioned rim that is significantly faster than other deeper rims while handling crosswinds like a box-sectioned rim. Exposed spoke nipples sit in the aerodynamic shadow of the rims, keeping serviceability simple without compromising speed. And Zipp's signature ABLC™ rim dimples squeeze every last second of performance possible.


  • Firecrest rim shape
  • 24 spokes laced virtual 3x
  • 6-bolt - rotor not included
  • Swiss bearings
  • 900 grams
  • Valve extender, rim strip and skewer included
  • 45mm Rim depth and 27.5mm width
  • Carbon Bridge™ technology for rim strength
  • Compatible with Shimano/SRAM cassettes of up to 11-speed to work with all modern drivetrains

The Zipp 303 Firecrest has a 250 pound rider weight limit and a 125psi tire pressure limit

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