303 S Tubeless Disc brake XDR Wheelset

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 our 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 40 kph 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.

SPECIFICATIONS

Size (wheels) : 700c

Rim construction : Carbon

Tire compatibility : Clincher Tubeless Ready

Brake compatibility : Disc (Center Lock)

Rim - inside width : 23mm

Rim profile : Symmetrical

Rim finish : UD fiber / Bake-On labels / Matte clear coat

Nipple material : Brass

Spoke type : CX-Sprint

Spoke count : 24

Spoke pattern : 2 Cross

Axle type (Wheels) : TA 12x100

Bearings : Cartridge - Steel

Driver Mechanism : n/a

Weight Based On : 

Lightest configuration : 12mm through axles and XDR body. No tape or valve

included in weight. 

Front : 711g

Rear : 819g

Weight (g) : 1530

Front : 710845851124

Rear : 710845851155