ZIPP 858 NSW Tubeless Disc Rear
Zipp’s ultimate aero weapon is fast in the wind (thanks to its undulating rim shape) and on the ground (thanks to tubeless). You get the many aero advantages of the 858 NSW Tubeless Disc-brake wheelset with the added benefit of increased cornering grip and compliance with reduced rolling resistance of tubeless. The wheelset’s 18mm internal width is optimized for running wider tires at reduced air pressure. The 858 NSW’s undulating rim shape, our proprietary Sawtooth™ profile, takes design cues from nature for our highest-performing wheel when it comes to aero efficiency and crosswind stability.
These structures inspired Zipp advanced development engineers to, for the first time, systematically apply biomimicry to solve the complex challenge of designing a wheel, with the undulating Hyperfoil™ nodes, that reduces both aerodynamic drag and side force. When it comes time to scrub off speed or stop, disc brakes will give you the confidence and stopping power you need. Simply put, the 858 NSW Tubeless Disc brake is ideal for those focused on triathlon, time trials, or aggressive road riding. The 858 NSW’s Cognition DB V2 Hubset is re-engineered with Axial Clutch V2™ for quicker engagement and lower friction Every time a conventional hubset starts to coast, friction within the freehub ratchet mechanism works like a drum brake to slow the rider down.
The drag between the hub shell and driver body during coasting is considered as efficiency loss, especially for road wheels. The solution? The rear Cognition DB V2™ hub with AxialClutch V2™ technology reduces drag by disengaging the ratchet mechanism when coasting. The AxialClutch V2’s™ wave spring acts to re-engage the ratchet mechanism quickly and consistently once the rider starts pedaling. The hubset also is lightweight and durable.
- A cosmetic identity that screams speed, Zipp graphics applied using Zipp’s ImPress™ direct-print technology
- Cognition DB V2 hubset rolls efficiently whether you are pedaling or coasting. Its Axial ClutchV2™ technology reduces drag and lowers friction
- 18mm internal width and tubeless compatibility for optimization of wider tires with lower tire pressure
- Sawtooth™ rim with Hyperfoil™ nodes and HexFin™ ABLC dimple pattern for top aero and crosswind-stability performance with an undulating 77/82mm rim depth
- Center locking rotor interface. Lockring is included
- XDR™ or SRAM/Shimano driver bodies Ships with 12mm front and rear end caps
- Campagnolo driver body sold separately
- Lifetime Warranty
HOOKLESS TIRE COMPATIBILITY
The model year 2021 and later Zipp 303 S, 303 Firecrest, and 353 NSW disc-brake wheels, as well as the model year 2022 Zipp 404 Firecrest and 858 NSW and 454 NSW wheels are compatible with tubeless or tubeless-ready tires unless the tire manufacturer specifically prohibits the use of their products on tubeless hookless (straight side) rims.
This article is a guide. We recommend that riders confirm compliance with the tire manufacturer to ensure proper performance and safety. *The following tire brands have communicated to Zipp that some of their tubeless models are compatible with Zipp hookless wheels:
- Continental (Grand Prix 5000 S TR in sizes 700x28, 700x30 and 700x32)
- Rene Herse
- Schwalbe (Pro One TLE, Pro One TT TLE, One TLE)***
- Specialized (SW Turbo RapidAir in sizes 700x28 and 700x30)
- Zipp (Tangente Course G40 XPLR gravel tire)
Notice: Zipp hookless rims are not compatible with tires that have a higher minimum pressure than 72.5 psi (5 bar). Please follow the tire manufacturer’s minimum inflation pressure recommendations marked on your tire.
***Schwalbe TLE tires are currently marked with minimum tire pressure above 73psi (5 bar). Schwalbe has confirmed that their listed tires can be ridden at pressures under 73psi (5 bar) on Zipp hookless rims, according to their current testing.
Zipp hookless rim disc-brake wheels meet the existing industry standards for the dimensions that control tire retention. The tire manufacturer determines their tire’s compatibility with those standards. Zipp is actively collaborating with tire manufacturers within ISO and ETRTO committees to develop clear international standards for tubeless road tires.
*We will continue to update this list as more tire manufacturers communicate hookless rim compatibility.
Watch the video to learn more about Zipp hookless technology:
|RIM CONSTRUCTION||Carbon - w/Hooks|
|TIRE COMPATIBILITY||Tube-type or Tubeless tires|
|BRAKE COMPATIBILITY||Disc (Center Lock)|
|DRIVER BODY TYPE||n/a, SRAM XDR, SRAM/Shimano Road|
|RIM - INSIDE WIDTH||18mm|
|MAX RECOMMENDED SYSTEM WEIGHT||250lbs/114kg|
|MAX TIRE PRESSURE||125psi/8.6bar|
|RIM FINISH||UD fiber, Impress technology|
|SPOKE LENGTH DS||226mm, 232mm|
|SPOKE LENGTH NDS||230mm, 232mm|
|WEIGHT BASED ON||Wheel set in lightest configuration: 12mm through axles and XDR body. No tape or valve included. Front: 838g Rear: 935g|