ZIPP 858 NSW Rear Wheel (ZR1 SL) - 28" | Carbon | Hookless | Centerlock - 12x142mm - HG

858 NSW – Aero Advanced

With the 858 NSW, ZIPP presents its ultimate aero wheelset for road bike, triathlon and time trial. Thanks to ZIPP's "Total System Efficiency" concept (TSE), the advanced carbon wheels are even faster than ever before. They combine the positive characteristics of high rims with a low weight, which is normally only achieved with 20 mm lower profiles.

The inner rim width of 23 mm is ideal for running wider tires with lower pressure. This not only reduces rolling resistance, riders also benefit from a smoother ride and less fatigue. This is particularly advantageous for the subsequent running section in a triathlon. Meanwhile, the wave-shaped HyperFoil profile with its differentiated SawTooth rim depth of 82/85 mm and the HexFin ABLC dimple structure ensures maximum aerodynamic efficiency and crosswind stability. The result is pure speed.

With its optimized rim bed, which noticeably simplifies tire mounting, the 858 NSW wheelset furtherly scores with a very practical feature. The wheels are rounded off by the ZR1 SL premium hubs, which are 30 grams lighter than the previous version and have ceramic hybrid bearings, which also benefit the rolling behavior. In addition, their focus on disc brakes guarantees more reliable speed control and braking power in all weather conditions.

Technical details of the ZIPP 858 NSW rear wheel

• rim: carbon, symmetrical
• tire type: Tubeless Only
• construction: Hookless / TSS
• wheel size: 28 inch (700C)
• outer width: 27 mm / inner width: 23 mm
• profile height: 82/85 mm (SawTooth)
• recommended tire width: 28 to 32 mm (optimal: 30 mm)

• hub: ZIPP ZR1 SL, aluminum
• brake disc interface: Centerlock
• bearings: hybrid (ceramic balls + stainless steel cups), cartridge type
• freewheel body: aluminum
• freewheel type: 6-pawl (66 engagement points)
• installation dimension: 12 x 142 mm (thru axle)

• spokes: Sapim CX-Ray, stainless steel, J-Bend (aero / ⌀ 2.0 - 2.2/0.9 - 2.0 mm)
• spoke count: 20
• spoke pattern: double crossed
• nipples: Sapim, aluminum, 2.0 x 16 mm, Square Head, Secure Lock (self-locking)

• weight: approx. 1500 g (front wheel + rear wheel; manufacturer's specification)
• max. system weight (incl. rider): 114 kg

Total System Efficiency (TSE) | Based on the simple premise "efficiency = speed", the SRAM Group introduces TSE, a solution for maximum performance in the real world, a world of imperfect roads and ever-changing riding conditions. In cycling terms, efficiency means less effort in overcoming air resistance, gravity, rolling resistance and vibration losses. The result: more speed with less power. The factors that enable a correspondingly more efficient ride are wider (Tubeless) tires, lower air pressure, an optimized rim profile and a new type of rim laminate.

Tubeless Straight Side (TSS) | Hookless Tubeless or Tubeless Straight Side describes the design of the rims. Tubeless-compatible rims can be ridden without a tube, but a setup with a tube is also possible. Hookless or Straight Side describes the shape of the rim flange, which in this case is straight and designed without the classic hook. This design offers advantages in terms of greater impact resistance of carbon rim flanges.

ImPress Direct-to-Print | With the help of this technology, the graphics are printed directly onto the rim. In this way, the function of the dimples on the rim surface, which lies in the controlled dissipation of air turbulence, is retained. This is crucial for the stability and therefore also for the aerodynamic efficiency of the wheel.

Notes and recommendations:

• Tire pressure: ZIPP specifies a maximum air pressure of 5 bar (73 psi). Depending on the tire width, 5 bar / 73 psi (28/29 mm) or 4.5 bar / 65 psi (30 to 32 mm) are recommended.
• Inner tube: The use of an inner tube is possible, but only in conjunction with a Hookless-compatible tire. The 858 NSW rims are optimized for tires with a width of 30 mm. The highest speeds are achieved with a tire width of 28 mm.
• Warranty: ZIPP offers an unlimited warranty on the 858 NSW wheels, which covers all structural damage. Wear and service parts such as spokes, bearings and freewheels are excluded from the warranty.

Scope of supply:

rear wheel incl. rim tape (26 mm), brake rotor lock ring and removable end caps (12 mm)