Zipp: RADICAL BY DESIGN, EVOLUTIONARY BY NATURE Zipp’s ultimate aero weapon is now tubeless ready. That means you get the many aero advantages of the 858 NSW Tubeless Disc-brake wheelset with the added benefit of increased cornering grip and compliance with reduced rolling resistance. The wheelset’s 19mm internal width is optimized for running wider tires at reduced air pressure. The 858 NSW’s undulating 77/82mm-deep rim shape, our proprietary Sawtooth™ profile, takes design cues from nature for our highest performing wheel when it comes to aero efficiency and crosswind stability. These structures inspired Zipp advanced development engineers to, for the first time, systematically apply biomimicry to solve the complex challenge of designing a wheel, with the undulating Hyperfoil™ nodes, that reduces both aerodynamic drag and side force. When it comes time to scrub off speed or stop, disc brakes will give you the confidence and stopping power you need. Simply put, the 858 NSW Tubeless Disc brake is ideal for those focused on triathlon, time trials, or aggressive road riding.FEATURESNew Zipp graphics and cosmetic identity that screams speed, applied using Zipp’s ImPress™ direct-print technologyCognition DB hubset rolls efficiently whether you are pedaling or coasting. Its Axial Clutch™ technology allows the freehub’s ratcheting mechanism to deliver half the mechanical drag of conventional three-pawl hubs19mm internal width and tubeless compatibility for optimization of wider tires with lower tire pressureSawtooth™ rim with Hyperfoil™ nodes and HexFin™ ABLC dimple pattern for top aero and crosswind-stability performance with an undulating 77/82mm rim depthCenter locking rotor interface. Lockring is includedXDR™ or SRAM/Shimano driver bodiesShips with 12mm front and rear end capsCampagnolo driver body sold separately SPECIFICATIONSOrientation (wheels): RearSize (wheels): 700cRim construction: CarbonTire compatibility: Clincher Tubeless ReadyRim depth: 82mmSurface texture: ABLC SawToothBrake compatibility: Disc (Center Lock)Rim - inside width: 18mmRim profile: SymmetricalRim finish: UD fiber, Impress technologyColor (Decal): StandardNipple material: AluminumNipple anti-rotation: Sapim Secure-LocSpoke type: CX-Ray - BlackSpoke count: 24Spoke pattern: 2 CrossHub: CognitionDriver body type: SRAM/Shimano RoadColor (hub): Dual Tone: Matte & Glossy BlackAxle type (Wheels): TA 12x142Axle material: Aluminum front & rearBearings: Cartridge - Stainless SteelDriver Mechanism: Axial ClutchDriver body material: AluminumMax tire pressure: 125psiMax recommended rider weight: 250lbs