ZIPP rear wheel 28" 858 NSW Carbon Clincher | Tubeless | Center Lock | 12x142 mm thru axle | SRAM XDR freewheel body
The 858 NSW wheels are Zipp's ultimate aero weapon. Thanks to their rim height of 82 to 85 millimeters, they have a large sail area and help you to set new records wherever speed is important. The handling, on the other hand, is more reminiscent of wheels with a rim height that is 20 millimeters lower. Thanks to their wave-shaped, patented sawtooth design, they are extremely stable in crosswinds. In addition, the weight has been reduced by 243 grams (per wheelset) compared to the previous version, which allows the 858 NSW to accelerate easily and also makes it interesting for undulating road races and as all-round road bike wheels. Thanks to the Zipp Carbon Internal Reinforcement Technology (CiR), the rims could be made 10% lighter and are just as stable as the previous version. The inner rim width, which has been increased to 23 millimeters, in conjunction with the hookless profile, integrates 28 millimeter wide tires aerodynamically perfectly and you can benefit from the better rolling resistance properties and greater comfort of wider road bike tires.
Total System Efficiency (TSE)
The 858 NSW wheels were developed under the TSE approach. The development goal was to find the best possible impeller design to overcome the speed barriers that exist under realistic driving conditions. In addition to wind resistance, gravity and rolling resistance, this also includes vibration losses in poor road conditions.
Zipp Cognition hubs
The Cognition V2 hub set, developed in Germany, impresses with its unique freewheel system. The system is similar to a toothed disk freewheel, but due to the special arrangement of the toothed disks (axial clutch) it only generates half as much frictional resistance when rolling as a conventional ratchet system. The second version of the hubs has an improved sealing system and the freewheel mechanism is even more responsive.
The aerodynamically extremely efficient sawtooth profile, which was modeled on the fin ends of the humpback whale, varies between a rim height of 82 to 85 millimeters. In combination with the newly designed hexagonal ABLC dimples (recesses on the outside of the rim), the design ensures very high crosswind stability, especially at larger angles of attack.
With the ImPress graphic technology, the Zipp lettering is printed directly onto the rim. This allows the recessed structures on the rims to unfold their full effect.
NOTE: Due to the hookless profile, the Zipp 858 NSW wheels are only suitable with the use of ETRTO-compliant tubeless tires. However, the corresponding tubeless tires can be ridden with a tube on the wheels without any problems. You can find an overview of all compatible tires for your Zipp hookless wheelhere . Contrary to the illustrations, the wheel comes with a SRAM XDR freewheel body.
Area of intended use : time trial, triathlon, racing bike
Size: 28" (ETRTO: 23-622)
Rim type: carbon clincher (only for tubeless tires)
Brake type: only for disc brake
Brake disc mount: Center Lock
Materials: carbon, aluminum
Internal width: 23mm
External width: 27mm
Rim height: 82 to 85 mm
Number of holes: 20 holes
Axle standard : 12x142 mm thru axle type (QR12)
bearing : 4x industrial bearings
Freewheel compatibility: 12-speed SRAM XDR
Freewheel type: Axial Clutch toothed disc system; 54 rest points per wheel revolution
Spokes: 20x J-Bend Sapim CX-Ray
tubeless capable: yes
recommended tire width: 25-32 mm (aerodynamically optimized for 28 mm tires)
maximum tire pressure: 5 bar (73 psi)
maximum system weight: 114 kg
Finish: UD carbon matte
Weight according to the manufacturer: 811g (without tubeless tape and without tubeless valve)
Weight weighed: 830g (including tubeless tape and tubeless valve; Shimano version)
Scope of delivery:
1x rear wheel Zipp 858 NSW
1x tubeless rim tape
1x tubeless valve
1x center lock locking ring
1x spacer for SRAM XD 11-speed cassettes
INFO: only available for European + Russian Customers