*Please Note: Images for display purposes only - check description for specifications.Without LimitsRoad bikes are going where they’ve never gone before, are expected to do more, and are being ridden harder than ever. At the same time disc brakes are rewriting the rules of what’s possible with rim design. For this new era, the Zipp® 303 Firecrest Tubeless Disc-brake wheelset sets the new standard. With an all-new disc-specific, tubeless rim, the 303 Firecrest Carbon Clincher is now internally 21mm wide and faster than ever. Designed from the start as a tubeless rim, the 303 Firecrest features a rim bed made with internal ridges to lock the tire’s bead in place, ensuring secure performance, even when ridden at lower tire pressures. A new carbon fibre layup keeps weight low while maintaining the 303’s legendary durability. The rim’s lightweight design allows the 303 to glide up the steepest climbs while our robust 77/177D hubset, keep the wheels stiff and responsive.Things To RememberAero, durable, Light weight, Tubeless,77/177 hubset,Thru-axle compatible,. Features And BenefitsFirecrest rim Technology provides world class handling and stability,77/177d hubset, with its best-in-class durability and improved bearing protection, all with no pre-load adjustment needed,Aero performance, durable and Light Weight,To ensure compatibility with any bike, our versatile 77/177D hubs come with swappable end caps to work with QR’s and thru-axles,ISO 4210 compliant.,. SpecificationsSize (wheels): 650B, 700c,Rim construction: Carbon,Tire compatibility: Clincher Tubeless Ready,Brake compatibility: Disc (6-bolt),Rim - inside width: 21mm,Rim profile: Symmetrical,Rim finish: UD fibre, adhesive decals,Colour (Decal): Black, Blue, White,Nipple material: Aluminium,Spoke type: CX-Ray - Black,Spoke count: 24,Spoke pattern: 2 Cross,Axle type (Wheels): Conversion Caps included,Bearings: Cartridge - Carbon Steel,.