Zipp’s ultimate aero weapon is faster than ever thanks to our proprietary Total System Efficiency technology. With TSE the 858 NSW Carbon Tubeless Disc-brake wheelset features a tubeless and hookless rim profile for seamless tire interface and huge drop in weight. The 858 gives you the benefits of our deep rims at weight typically associated with rims that are 20mm shallower. The wheel’s internal width is 23mm ideal for running wider tires with lower pressures for decreased rolling resistance. That’s how TSE technology helps you conquer the four barriers to speed: Wind Resistance Gravity Rolling Resistance and Vibration Losses.  The 858 NSW’s undulating 82mm-85mm deep rim shape our patented Sawtooth profile is our highest performing design for aero efficiency and crosswind stability. The result is the pure speed especially for triathletes time trial specialist and any other speed freak. What’s more while this wheelset is optimized for tubeless tires you still have the option to run tubeless ready tires with tubes. The 858 NSW is fastest with a 28mm tire. In triathlon running wider tubeless tires at lower pressure makes you faster while also smoothing out the ride so your body is fresher for the run. Disc brakes also offer more reliable speed modulation and braking power in all weather conditions. The 858 NSW features the premium ZR1 SL hubset with ceramic bearings and 66 points of engagement. Features Zipp’s most advanced and fastest deep-rim wheel for road triathlon and time trialing More than 243 grams lighter that previous model Optimized tire bed for easy tire installation TSE for greater efficiency and reduced rolling resistance Sawtooth rim with Hyperfoil nodes and HexFin ABLC dimple pattern for top aero and crosswind-stability performance with an undulating rim depth ZR1 SL hubset with ceramic bearings Ships with 12mm front and rear end caps Center locking rotor interface. Lockring is included with the wheels XDR or SRAM/Shimano driver bodies Zipp graphics applied using Zipp’s ImPress direct-print technology Minimum 25mm tire width Campagnolo driver body sold separately 1500 g Lifetime Warranty Specifications Size wheels: 700cRim construction: Carbon – HooklessTyre compatibility: Tubeless tyres onlyRim depth: 85mmBrake compatibility: Disc Centre LockRim - inside width: 23mmRim profile: SymmetricalRim finish: UD fibre Impress technologyNipple material: AluminiumSpoke type: CX-Ray - BlackSpoke count: 20Spoke pattern: 2 Cross Radial drive 2 Cross non-driveDriver body type: SRAM XDR SRAM/Shimano RoadAxle type wheels: TA 12x100 TA 12x142Bearings: Cartridge - CeramicDriver mechanism: 6 Pawls Compression 66 POEMax tyre pressure: 73psi / 5.0barMax recommended system weight: 250lbs / 114kgSpoke length DS: 220mm 230mmSpoke length NDS: 232mmMax outside width: 27mm