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Zipp 303 S Tubeless Disc Brake Rear Wheel - XDR

Zipp’s 303 S Tubeless Disc Brake Rear Wheel - XDR provides today’s cyclists the versatility they demand with the speed they crave. Expanding greatly on its heritage of conquering the Spring Classics, this 303 wheelset maintains its ideal-for-every-terrain 45mm rim depth but adds a significantly wider internal width to provide greater performance and ride quality in almost every measurable way. The 303 S is among Zipp’s lightest wheelsets, optimised for top aero performance with a 28mm tyre but capable of handling gravel tyres up to 50mm wide. The 303 S borrows design concepts from the higher-level 303 Firecrest Tubeless Disc-brake wheelset to gain speed through increased efficiency. That is achieved by creating a wheel with reduced: Wind resistance, rolling resistance, rider fatigue, and weight. The key innovation is in the 303 S Series’ rim design. Its 45mm rim depth is the same as its predecessor, the 302 Disc brake. But its rim width is 2mm wider, at 27mm, and its tyre bed is a full 7mm wider, at 23mm. That rim platform is designed to be the fastest with a 28mm tyre. The wide rim optimises tyre profile to allow lower tyre pressure. That helps to reduce rolling resistance and provides a more compliant ride. The result of all this is a 10 percent watt savings vs. a top peer wheel in total power required to ride 40kph on a smooth flat road with a 28mm tyre, according to internal Zipp testing. This groundbreaking wheelset also features all-new cosmetics, setting the rider apart from the pack, and comes at an attractive price and each wheel includes: Tubeless rim tape, Tubeless valve & Centre lock lock-ring.  

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Zipp 303 S Tubeless Disc Brake Rear Wheel – XDR

The model year 2021 and later Zipp 303 S disc-brake wheels are compatible with tubeless or tubeless-ready tyres, unless the tyre manufacturer specifically prohibits the use of their products on tubeless hookless (straight side) rims. Minimum compatible tyre width is 700 x 25C.

  • New Zipp graphics and cosmetic identity that scream speed.
  • Fastest with 28mm, fits wide gravel tyres as well.
  • Weight Total: 1,525g – Front: 710g Rear: 815g
  • 76 / 176 DB hubs with Center locking interface.
  • Wide rims optimise tyre profile to allow lower tyre pressure, especially with tubeless. The result is a larger contact patch for increase grip for confident cornering, descending, and handling in wet conditions.
  • Lower tyre pressures and larger volume provides a compliant ride with fewer vibrations.
  • Significant watt savings when running larger tyres at lower pressure.
  • Wide hookless rims create a seamless transition to the tyre, reducing drag.

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