Zipp 303 S

All-Road Aerodynamics. Modern Hookless Speed.

The engineering highlight of the Zipp 303 S is its Wide Hookless Rim Profile. Designed specifically around Zipp’s Total System Efficiency (TSE) concept, the 303 S targets the four key barriers to speed: wind resistance, gravity, rolling resistance, and vibration loss. The 23mm internal width allows tubeless tires to sit wider and flatter, creating a seamless transition between the tire and the carbon rim for superior aerodynamic drag reduction, reduced rolling resistance, and enhanced cornering grip at lower tire pressures.

Why the Zipp 303 S is a Benchmark Wheelset:

• Total System Efficiency (TSE): Tuned carbon layup and wide tubeless interface actively overcome vibration losses, converting more of your physical effort into forward momentum over rough pavement and gravel.

• 45mm Versatile Depth: The ideal depth profile for all-around speed, offering proven aerodynamic drag savings on flat sections while remaining stable in crosswinds and lightweight on climbs.

• Wide 23mm Internal Hookless Rim: Optimized for 28mm road tires up to 50mm gravel rubber, providing a plumper tire footprint for unmatched cornering traction and reduced pinch flats.

• 76 / 176 DB Hubset: Smooth-rolling, durable Zipp hubset with Centerlock disc interface and proven 3-pawl freehub engagement for low maintenance and crisp acceleration.

• Tubeless Optimized: Quick, hassle-free tubeless setup with secure bead seat locks for confident low-pressure riding.

• Zipp Lifetime Warranty: Backed by Zipp’s comprehensive lifetime warranty against manufacturing defects and crash damage for total riding confidence.

Technical Specifications:

• Rim Material: Carbon Fiber (Hookless Tubeless Only)

• Wheel Size: 700c

• Rim Depth: 45mm

• Internal Rim Width: 23mm

• External Rim Width: 27mm

• Hubs: Zipp 76 DB (Front) / Zipp 176 DB (Rear)

• Brake Interface: Centerlock Disc

• Spoke Count: 24 Front / 24 Rear (Sapim CX-Sprint)

• Wheelset Weight: ~1,530g

• Freehub Options: SRAM XDR, Shimano/SRAM 11/12Speed Road

The Alegro Perspective: The 303 S is easily one of our most popular carbon wheel upgrades. Zipp took the proven aerodynamic pedigree of their top-tier wheels and packed it into a accessible, reliable package. Moving to a 23mm hookless rim lets you run 28c or 30c tubeless tires at lower pressures (around 50-65 PSI for most riders), which completely transforms your ride quality. It absorbs high-frequency road chatter, corners like it's on rails, and maintains high speeds with noticeably less effort.

Uncompromising Carbon Performance. All-Road Versatility. Elevate Your Ride with Zipp.