The Zipp 858 NSW Tubeless Disc Rear Wheel is a flagship-level aero road and triathlon wheel engineered for maximum speed, efficiency, and stability. With its undulating 8285 mm rim depth, tubeless compatibility, and advanced NSW technologies, the 858 is designed for time trials, triathlons, and fast road racing where every watt matters.

The rim profile features Zipps patented Sawtooth technology with Hyperfoil nodes, designed to improve crosswind stability while maintaining unmatched aerodynamic efficiency. Its 23 mm internal width is optimized for 28 mm tubeless road tires, reducing rolling resistance and increasing rider comfort. The hooked tubeless design ensures compatibility with a wide range of tire options, while disc brake integration delivers consistent stopping power in all conditions.

At the core is the Cognition V2 rear hub, equipped with an Axial Clutch V2 mechanism that reduces drag and engages quickly for efficient power transfer. Sapim CX-Ray bladed spokes complete the build, balancing stiffness, aerodynamics, and lightweight responsiveness. The 858 NSW is built for athletes chasing podium finishes and new personal bests.

Zipp 858 NSW Tubeless Disc Rear Wheel Specs at a Glance

• Rim Depth: 8285 mm (Sawtooth profile)
• Internal Width: 23 mm
• External Width: ~28 mm
• Rim Type: Hooked tubeless-ready carbon
• Brake Type: CenterLock Disc
• Tire Compatibility: Tubeless or clincher; optimized for 28 mm road tires
• Hub: Cognition V2 Disc with Axial Clutch V2
• Spokes: Sapim CX-Ray, bladed
• Axle Compatibility: 12142 mm thru-axle
• Freehub Options: SRAM XDR or Shimano HG
• Weight: Approx. 1,020 g (rear)

Design Benefits

1. Aero Advantage: Sawtooth rim profile minimizes drag and enhances crosswind stability.
2. Wider, Faster Setup: 23 mm internal rim width pairs perfectly with 28 mm tubeless tires for lower rolling resistance.
3. Efficient Hub Design: Cognition V2 hub with Axial Clutch V2 reduces drag and improves engagement.
4. Disc Brake Precision: CenterLock system ensures confident braking and handling in any conditions.
5. Race-Ready Build: Lightweight carbon construction and Sapim CX-Ray spokes deliver stiffness and speed.

Final Take

The Zipp 858 NSW Tubeless Disc Rear Wheel is built for serious athletes seeking the ultimate aero advantage. With its unique rim profile, wide tubeless platform, and advanced hub technology, this wheel is purpose-made for triathlon, time trial, and fast road racing performance.