Zipp 858 NSW Carbon Disc SRAM XDR 28“/700C Rear Wheel, MY2023

Designed for uncompromising speed!
The ZIPP 858 NSW™ carbon rear wheel is designed for competitive riders who are basically looking for maximum performance – be it in triathlons, time trials or criterium races. Even visually, ZIPP leaves no doubt about the racing DNA of the handmade 85mm deep-section rims: The distinctive Sawtooth™ rim profile with HexFin™ ABLC dimple pattern combines excellent aerodynamic properties with superior crosswind stability, so you can stay in the drops longer and save massive amounts of watts.

The ZIPP Total System Efficiency (TSE™) design approach is now also being applied to the 858 model series, recognisable by the consistent focus on wider tyres and tubeless systems. With in inner rim width of 23mm and a modern hookless rim profile, the 858 NSW is optimised for 28mm wide tyres in model year 2023. ZIPP’s calculation here is: Reduced rolling resistance plus better vibration damping plus increased grip equals more speed. The hookless rim profile not only brings advantages in terms of cornering stability and aerodynamics, but is also reflected on the scales. The engineers from Indianapolis were able to save around 120 grams compared to the previous model. So finally, rims can be both lightweight and deep.

At the centre of the wheel, the Cognition V2 rear hub ensures permanently low-friction and reliable running. High-volume, self-aligning cartridge bearings promise high resistance even in tough continuous use, while the improved Axial Clutch™ technology makes the ratchet freehub system with 54 points of engagement particularly smooth-running and efficient. The flange geometry with 20 J-bend spokes endows the wheel with max torsional and lateral stiffness. All of these qualities will benefit you in a competition. If you want to keep pace with the competition and the times, the ZIPP 858 NSW™ is a must-have. Not a wheel for nostalgists, but definitely one for winners!

Highlights:
• SawtoothTM: The varying height and sawtooth rim profile reduces both wind resistance at different inflow angles as well as crosswind resistance.
• HyperfoilTM technology: Refers to the individual waves of the SawtoothTM rim profile, which are equipped with HexFinTM ABLC dimples, making the rim aerodynamically optimised and providing distinct crosswind stability.

• HexFinTM ABLC technology: Hexagonal-shaped depressions of varying size that form clusters of fin-shaped surfaces on the rim flanks and reduce air turbulence.
• ImPress™ technology: The ZIPP graphics aren’t glued on, but printed directly onto the wheel – that way the dimples in the rim flanges are unaffected and don’t lose their ability to reduce vortex shedding.
• TSE™ – Total System Efficiency: Holistic design philosophy that incorporates the four biggest barriers to speed into the development: wind resistance, gravity, rolling resistance and vibration losses. The TSE™ wheels are therefore characterised by optimised aerodynamics and weight and stand out for tubeless compatibility and their orientation towards wider tyres.
• Axial ClutchTM technology: Special freewheel technology that reduces rotational resistance during pedalling breaks.

Technical details:
• Rim material: carbon (UD finish)
• Rim type: clincher
• Rim profile: hookless, symmetrical
• Size: 28″ / 700C
• ETRTO: 23-622
• Rim width/depth: approx. 27 mm / 82-85 mm
• Inner rim width: 23 mm
• Tubeless ready
• For Presta valve (Ø 6.5 mm)
• Max. tyre pressure: 5.03 bars (73 PSI)

• Spoke type: Sapim CX-Ray J-Bend aero spokes
• Number of spokes: 20
• Spoke pattern: 2-cross
• Spoke nipples: Sapim Secure Lock (aluminium)

• Hub type: Cognition V2
• 4 sealed cartridge bearings
• Sealed, maintenance-free bearings – doesn’t require preload
• Brake disc mount: Center Lock
• Freehub: ratchet system (54 teeth, 6.66° degree engagement)
• SRAM XDR™ 12-speed compatible
• Hub width: 12 x 142 mm (thru axle)

• Maximum recommended rider’s weight: 113 kg
• Weight: approx. 811 g

In the box:
• 1x ZIPP 858 NSW Carbon Disc Brake SRAM XDR Road Bike Rear Wheel 2023

ATTENTION:
ZIPP wheels with hookless rims are only approved for use with tubeless and/or tubeless-ready tyres. However, an inner tube can be used with a compatible tubeless/tubeless-ready tyre.
Under the following link you will find a continuously updated list of tyre models that are designated by the respective manufacturer as compatible with ZIPP wheels that have hookless rims.
https://www.sram.com/de/zipp/campaigns/hookless-tire-compatibility