Speed for all Roads ahead: the 303 S Carbon Clincher from Zipp

Road bikes are more versatile than ever, no matter the road surface, but just as fast as before. The 303 S offers an entirely new rim profile and design to optimize rider performance on this new breed of bike. This wheelset is tubeless for disc-brake bikes, allowing the ability to run wide tires at lower pressures for race-ready speed on or off the pavement. The 303 S is among Zipps lightest wheelsets, optimized for top aero performance with a 28mm tire but capable of handling gravel tires 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 tire bed is a full 7mm wider, at 23mm. That rim platform is designed to be the fastest with a 28mm tire. The wide rim optimizes tire profile to allow lower tire 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 tire, 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.

Features – Zipp 303 S Tubeless Disc-brake

• New Zipp graphics and cosmetic identity that scream speed
• Fastest with 28mm, fits wide gravel tires as well
• 76 / 176 DB hubs with Center locking interface
• XDR driver body option or Shimano HG option
• Wide rims optimize tire profile to allow lower tire pressure, especially with tubeless. The result is a larger contact patch for increase grip for confident cornering, descending, and handling in wet conditions
• Lower tire pressures and larger volume provides a compliant ride with fewer vibrations
• Significant watt savings when running larger tires at lower pressure
• Wide hookless rims create a seamless transition to the tire, reducing drag

Product features

• Use: Road
• Model: 303 S Carbon Clincher
• Rim size: 28″
• Tyre type: Clincher
• Spokes: 24
• Brake type: Center Lock Disc
• Tubeless system: Yes
• Max recommended system weight: 115kg (body weight + bike + equipment)
• Max tire pressure: 5.03bar (73psi)
• Outer witdh: 27mm
• Inner width: 23mm
• Rim depth: 45mm
• Valve hole: SV (6.5mm)
• Hub: Zipp 76 / 176D
• Hub axle system:
  • front: 12 x 100 mm thru axle
  • rear: 12 x 142 mm thru axle
• Spoke type: Sapim CX-Sprint
• Spoke pattern: 2-cross
• Nipple type: Sapim secure-loc

Freehub Compatibility

• Shimano Freewheel: 8-/9-/10-/11-speed Shimano/SRAM (Road)
• SRAM XD/XDR driver body

Material