Zipp 858 NSW Carbon Tubeless Clincher Disc Brake Rear Bicycle Wheel

The Zipp 858 NSW is an 85mm-deep carbon disc brake rear wheel built for maximum aerodynamic performance on flat to rolling terrain. It sits at the top of Zipp's NSW lineup and is primarily targeted at triathletes, time trial riders, and road racers where sustained speed matters more than climbing weight savings.

What separates the 858 from other deep-section aero wheels is Zipp's patented Sawtooth rim profile — an undulating shape that varies between 82mm and 85mm in depth. That geometry manages airflow more effectively than a uniform deep rim and improves crosswind stability at race speed. The 23mm internal width is engineered to run 28–32c tires at lower pressures, reducing rolling resistance and road vibration without the weight penalty common in this rim depth category.

Who It's For

• Triathletes and time trial riders prioritizing speed on flat or rolling courses
• Disc brake road cyclists who want maximum aero performance and can manage a deep-section wheel
• Riders running SRAM XDR or SRAM/Shimano Road drivetrains
• Those committed to a tubeless tire setup (28–32c, ISO/TSS compatible)

Consider a shallower option (such as the Zipp 404 or 454 NSW) if your riding involves frequent climbing, technical descents, or consistently windy conditions — an 85mm rim demands active attention in crosswinds.

Key Features

Sawtooth Rim Profile The 858 NSW's undulating 82–85mm rim depth is specific to this model. The variable depth disrupts airflow in a way a straight-walled deep rim cannot, reducing drag and improving lateral stability — the primary reason this wheel handles crosswinds better than most wheels in its depth class.

Hookless Tubeless Construction The carbon hookless rim is compatible with ISO/TSS tubeless tires in 28–32c at a maximum of 73psi/5.0bar. This lower pressure ceiling is a hard requirement of hookless construction — tire compatibility must be verified before purchase. Tubeless-ready tires with tubes remain an option. The wheel is optimized for a 28mm tubeless setup at reduced pressure, which lowers rolling resistance and smooths road vibration.

ZR1 SL Hub with Hybrid Ceramic Bearings The ZR1 SL hub runs custom hybrid ceramic bearings and delivers 66 points of engagement — fast enough pickup for sprint and acceleration demands at the race level. Ceramic bearings reduce friction versus standard steel and hold up better under sustained high-load use. Driver body options cover SRAM XDR and SRAM/Shimano Road.

UD Fiber with Impress Technology The rim uses a unidirectional carbon layup with Zipp's Impress surface treatment, which is integrated into the laminate rather than applied as a topcoat. The result is a finish that resists wear better over time than a painted or decal-over-carbon surface.

Rider Intent Summary

• Biggest strengths: Sawtooth profile delivers crosswind stability uncommon at 85mm depth; hookless tubeless construction reduces system weight and rolling resistance; ceramic bearings lower drivetrain friction
• Tradeoffs: 85mm depth requires attentive handling in crosswinds; hookless rim demands compatible tire verification; 253lb/115kg max system weight limit applies
• What makes it different: The variable-depth Sawtooth profile (82–85mm) is unique to the 858 NSW — no other wheel in the Zipp lineup uses this geometry, and it's the defining reason the 858 behaves differently in crosswinds than a conventional deep-section wheel

Victory's Take

We spec the 858 NSW for riders who are committed to a tubeless setup, have confirmed tire compatibility, and are riding courses where an 85mm rim makes sense. If you're on the fence about whether this depth fits your riding, come in — it's worth a conversation before you commit.