Zipp 858 NSW - 00.1918.773.001 - 00.1918.773.000

Zipp 858 NSW ZR1 SL 82/85mm 12/142mm Disc Tubeless Ready 2025 Carbon Cycling Rear Wheel

The Zipp 858 NSW 00.1918.773.001 / 00.1918.773.000 rear wheel represents the pinnacle of aerodynamic performance for demanding cyclists. This tubeless carbon disc brake rear wheel combines lightness, stiffness and pure speed. Designed for triathletes, time trialists and all performance enthusiasts, it embodies Zipp quest for maximum efficiency.

Thanks to exclusive Total System Efficiency (TSE) technology, the 858 NSW simultaneously reduces the four main speed constraints: wind resistance, gravity, rolling resistance, and vibration losses. The result: superior efficiency, increased stability, and an exceptionally smooth ride on all roads.

Its unique 82-85mm deep wavy rim profile features Zipp 's patented Sawtooth design. This design maximizes air penetration while ensuring ultra-stable handling in crosswinds. As light as a 60mm wheel but as fast as an 85mm, the 858 NSW offers a decisive advantage in competition.

Technology and design

Total System Efficiency (TSE)

TSE (Total System Efficiency) technology optimizes overall performance by addressing four key factors: wind resistance, gravity, rolling resistance, and vibration losses. The tubeless and hookless profile allows for lower tire pressures for improved comfort and reduced rolling resistance.

Sawtooth Profile

The rippled "sawtooth" rim profile (82 to 85 mm) maximizes aerodynamics while providing exemplary stability in crosswinds. This Zipp -patented technology guarantees a perfect balance between speed and control, even at high speeds.

Tire and brake compatibility

The 858 NSW is optimized for 28mm tubeless tires, but also accepts tubeless-ready tires with inner tubes. The CenterLock disc braking system provides precise and consistent power modulation in all weather conditions.

ZR1 SL hub and freewheel body

The Zipp ZR1 SL hub, equipped with ceramic bearings and a 6-pawl freewheel mechanism offering 66 points of engagement, ensures instant power transmission. Available in XDR 12-speed or HG 10/12-speed versions, it guarantees compatibility and optimal performance for all configurations.

Technical characteristics

• Brand: Zipp
• Product family: Road wheels - rear
• Range: 858 NSW
• Tire type: Tubeless (hookless)
• Size: 700c
• Brake Type: CenterLock Disc
• Axle type: Thru Axle 12x142 mm
• Internal rim width: 23 mm
• External rim width: 27 mm
• Rim height: 85 mm (Sawtooth profile)
• Material: Advanced Carbon Composite
• Number of rear spokes: 20
• Spokes: Sapim CX-Ray black, Secure-Loc aluminum nipples
• Spoke assembly: Crossed by 2
• Spoke length: DS 230 mm / NDS 232 mm
• Bearings: Ceramic cartridge
• Freewheel mechanism: 6 pawls - 66 engagement points
• Freewheel body type: XDR 12V or HG 10/12V
• Maximum pressure: 5.0 bar / 73 psi
• Maximum recommended total weight: 114 kg (250 lbs)
• Rim finish: UD fiber - Impress Standard technology
• Hub color: Black
• Surface texture: Sawtooth ABLC
• Hub material: Aluminum
• Axle material: Aluminum

The Zipp 858 NSW ZR1 SL rear wheel is the ultimate choice for cyclists seeking performance, aerodynamics, and reliability. Its Sawtooth design, TSE technology, and ceramic hub make it a must-have for the most demanding competitors.