The 303 S represents a refined evolution in all-terrain road wheelset design, maintaining the proven 45mm rim depth whilst introducing a wider 27mm internal rim width and expanded 23mm tyre bed.  This geometry optimizes performance across diverse surfaces, enabling lower tyre pressures for enhanced compliance and reduced rolling resistance.

Engineered for disc-brake bikes, the tubeless-ready construction accommodates tyres from 28mm road to 50mm gravel specifications. Advanced aerodynamic profiling delivers approximately 10% power savings at 40kph compared to competing wheelsets, whilst the lightweight construction ensures responsive acceleration. The 303 S combines speed-focused engineering with practical versatility, making it ideal for riders demanding race-ready performance on variable terrain.

FEATURES

• New Zipp graphics and cosmetic identity that scream speed
• Fastest with 28mm, fits wide gravel tyres as well
• 76 / 176 DB hubs with Center locking interface
• Shimano HG & Sram XDR driver body option
• Wide rims optimize 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.

Tech Specs

FRONT

Hookless rims: Yes
Orientation (wheels): Front
Size (wheels): 700c
Rim construction: Carbon
Tyre compatibility: Clincher Tubeless Ready
Rim depth: 45mm
Surface texture: Smooth
Brake compatibility: Disc (Center Lock)
Rim - inside width: 23mm
Rim profile: Symmetrical
Rim finish: UD fiber / Bake-On labels / Matte clear coat
Colour (Decal): Standard
Nipple material: Brass
Nipple anti-rotation: Sapim Secure-Loc
Spoke type: CX-Sprint
Spoke count: 24
Spoke pattern: 2 Cross
Hub: 76D
Color (hub): Black
Axle type (Wheels): TA 12x100
Axle material: Aluminum front & rear
Bearings: Cartridge - Stainless Steel
Max tyre pressure: 73psi
Max recommended rider weight: 250lbs

REAR

Orientation (wheels): Rear
Size (wheels): 700c
Rim construction: Carbon
Tyre compatibility: Clincher Tubeless Ready
Rim depth: 45mm
Surface texture: Smooth
Brake compatibility: Disc (Center Lock)
Rim - inside width: 23mm
Rim profile: b
Rim finish: UD fiber / Bake-On labels / Matte clear coat
Color (Decal): Standard
Nipple material: Brass
Nipple anti-rotation: Sapim Secure-Loc
Spoke type: CX-Sprint
Spoke count: 24
Spoke pattern: 2 Cross
Hub: 176D
Colour (hub): Black
Axle type (Wheels): TA 12x142
Axle material: Aluminium front & rear
Driver Mechanism: 3 Pawls Leaf Spring
Max tyre pressure: 73psi
Max recommended rider weight: 250lbs