303 Firecrest Tubeless Rim - Front

Zipp’s 303 Firecrest Tubular rim-brake wheelset offers key innovations for performance-minded cyclists. This is the game-changing wheelset designed to conquer Roubaix and Flanders. Retaining their versatile 45mm rim depth, 303 Firecrest Tubular rims feature construction designs for impact protection. When it comes to pure speed, the 303 Firecrest Tubular packs a serious punch. It’s lightweight with ABLC™ Sawtooth™ Technology, a complex dimpling pattern first developed for our top-level NSW wheel lineup. This technology helps to achieve the optimization of low aerodynamic drag and crosswind stability, which we call AeroBalance™. Zipp’s ShowStopper™ textured braking surface delivers unrivaled rim braking performance in wet or dry conditions. At the center of the 303 Firecrest Tubular rim-brake is a new versatile and durable hubset, the German-engineered ZR1.

HooklessTire Compatibility

Zipp HooklessTire Compatibility

• Important Notice: Zipp hookless rims are not compatible with tires that have a higher minimum pressure than 73 psi (5 bar). Please follow the tire manufacturer’s minimum inflation pressure recommendations marked on your tire. Users must never inflate their hookless wheel and tire systems over 73 psi / 5 bar. Zipp wheels are fastest under this max pressure.

• The list above is for road tires only.

• Provided they are equipped with tubeless beads, wider gravel tires run at lower pressures are usually fine to use on hookless rims. In case of a doubt, please consult the tire manufacturer.

• Zipp hookless rims are designed for tubeless or tubeless-ready tires only. Inner tubes are ok, but the tire must have tubeless beads for safe retention.

• Zipp hookless wheels meet the existing industry standards for the dimensions that control tire retention. The tire manufacturer determines their tire’s compatibility with those standards. Zipp actively collaborates with tire manufacturers within ISO and ETRTO committees to develop clear international standards for tubeless road tires.

• As a result, any tubeless tire that is also compliant with these international standards should be compatible. However, tire brands have a right to declare which products are compatible or not with hookless rims.

• If you are interested in a tire not listed above, you are responsible for checking with the tire manufacturer to ensure the tire is compatible with Zipp wheels. Zipp created this list with tire makers as a convenience to our riders. Don’t hesitate to reach out to the tire makers directly.

• Consult Zipp’s Tire Pressure Guide to help determine your ideal air pressure. Consider using a larger tire size if the recommended pressure is too close to 73 psi / 5 bar for your setup.