Zipp’s 454 NSW Tubeless Disc-brake is the ultimate road racing wheelset. This wheel delivers everything the performance cyclist demands. It’s aerodynamically efficient and stable in all wind conditions. What’s more, a wider rim is designed for tubeless tires at lower pressure for reduced rolling resistance and vibration damping, so you’ll lose as little energy as possible out on the road. This wheel is optimized for 28mm tubeless tires for all out speed. The 454 NSW features Zipp’s most advanced technologies. Its undulating 58mm Sawtooth rim shape with Hyperfoils is our most aerodynamic and stable wheel. The 454 NSW features Zipp’s Total System Efficiency (TSE), our approach at combatting the biggest enemies of speed: wind resistance, gravity, rolling resistance, and vibration losses. At the center of the 454 NSW is the Cognition V2 Hubset re-engineered with an updated Axial Clutch V2 mechanism for quicker engagement, lower friction, and improved durability. Front wheel spec - Size (wheels): 700c Rim construction: Carbon Hookless Tire compatibility: Tubeless tires only Rim depth: 58mm Surface texture: ABLC HexFin Brake compatibility: Disc (Centre Lock) Rim - inside width: 23mm Rim profile: Symmetrical Rim finish: UD fibre, Impress technology Colour (Decal): Standard Nipple material: Aluminium Nipple anti-rotation: Sapim Secure-Loc Spoke type: CX-Ray - Black Spoke count: 24 Spoke pattern: 2 Cross Hub: Cognition 2 Colour (hub): Black Axle type (Wheels): TA 12x100 Axle material: Aluminium front & rear Bearings: Cartridge - Stainless Steel Max tire pressure: 73psi Max recommended rider weight: 250lbs/114kg Spoke Length DS: 254mm Spoke Length NDS: 252mm Max outside width: 28mm Rear wheel spec - Size (wheels): 700c Rim construction: Carbon Hookless Tire compatibility: Tubeless tires only Rim depth: 58mm Surface texture: ABLC HexFin Brake compatibility: Disc (Centre Lock) Rim -inside width: 23mm Rim profile: Symmetrical Rim finish: UD fibre, Impress technology Colour (Decal): Standard Nipple material: Aluminium Nipple anti-rotation: Sapim Secure-Loc Spoke type: CX-Ray - Black Spoke count: 24 Spoke pattern: 2 Cross Hub: Cognition 2 Driver body type: SRAM/Shimano Road Colour (hub): Black Axle type (Wheels): TA 12x142 Axle material: Aluminium front & rear Bearings: Cartridge - Stainless Steel Driver Mechanism: Axial Clutch V2, 54 POE Driver body material: Aluminium Max tire pressure: 73psi Max recommended rider weight: 250lbs Spoke Length DS: 248mm Spoke Length NDS: 254mm Max outside width: 28mm