{"product_id":"zipp-858-nsw-tubeless-disc-front-wheel","title":"Zipp 858 NSW Tubeless Disc Front Wheel","description":"\u003cdiv\u003e\n\u003cp\u003eThe \u003cstrong\u003eZipp 858 NSW Tubeless Disc Front Wheel\u003c\/strong\u003e is what you reach for when speed is the only variable that matters. Designed for triathletes, time trial specialists, and road racers targeting maximum flat-course velocity, the 858 NSW is Zipp's deepest road disc wheel — a 700c carbon hookless rim with an undulating Sawtooth profile that spans 82mm to 85mm at its peaks. This listing is the front wheel only at $1,900; most riders pair it with an 858 NSW rear or a Super-9 disc to complete the aero setup.\u003c\/p\u003e\n\n\u003ch3\u003eSawtooth Rim and the TSE System\u003c\/h3\u003e\n\u003cp\u003eThe 858 NSW is built around Zipp's patented Sawtooth rim profile and Total System Efficiency (TSE) framework — an engineering approach that treats the wheel as a system, targeting four barriers to speed simultaneously: wind resistance, rolling resistance, gravity, and vibration losses. The Sawtooth profile accomplishes something most deep-section wheels can't: it reduces aerodynamic drag and crosswind side force at the same time. Zipp calls this AeroBalance. It works through Hyperfoil nodes — patented fin-shaped structures along the inner rim diameter — paired with HexFin ABLC dimples at each node. These hexagonal depressions increase boundary layer mixing, keeping airflow attached to the rim at higher yaw angles. The result is a wheel that tracks predictably in crosswinds rather than fighting you for the line, even at 82–85mm depth. The Sawtooth geometry produces higher-frequency vortex shedding — smaller, more manageable vortices — a meaningful difference on an exposed course or when gusts arrive mid-effort.\u003c\/p\u003e\n\n\u003ch3\u003eHookless Carbon and the Tubeless Advantage\u003c\/h3\u003e\n\u003cp\u003eThe 858 NSW uses a hookless carbon rim with a 23mm internal width and 27mm external width, optimized for tires in the 28–32mm range. Hookless construction enables a more integrated tire-rim interface for reduced weight and improved sealing, and Zipp's TSE engineering produces a rim that delivers deep-section performance at weights typically associated with wheels 20mm shallower. For triathlon and TT, running wider tubeless tires at lower pressure reduces rolling resistance on chip-sealed roads while dampening vibration — preserving energy you need for the run after. Maximum recommended tire pressure is 73psi, and the rim accepts ISO\/TSS tubeless tires or tubeless-ready tires with tubes for riders who prefer that setup. The rim is also compatible with SRAM's Wheel Sensor for in-wheel tire pressure monitoring. ImPress graphics are applied by printing directly onto the rim surface rather than using adhesive decals, keeping the dimpled Hyperfoil profile uninterrupted and working as designed.\u003c\/p\u003e\n\n\u003ch3\u003eZR1 SL Hub and Build Spec\u003c\/h3\u003e\n\u003cp\u003eThe 858 NSW is built on Zipp's ZR1 SL hub with custom hybrid ceramic bearings — the same premium hub platform across the NSW lineup. Sixty-six points of engagement deliver immediate power pickup, and the hub ships with a 12×100mm thru-axle front end cap. Disc braking uses a Centerlock interface with the lockring included. The front wheel weighs approximately 716g — reasonable for a carbon disc rim at this depth — and Zipp backs the 858 NSW with a lifetime warranty.\u003c\/p\u003e\n\n\u003ch3\u003eWho This Wheel Is For\u003c\/h3\u003e\n\u003cp\u003eThe 858 NSW front wheel is purpose-built for courses where velocity is the priority and crosswinds are a manageable variable rather than a defining feature of the day. Triathletes racing long flat courses and TT specialists building race-day wheel sets are its natural home. Road racers who spend extended time in breakaways or high-speed criterium fields will find it effective. Riders racing in reliably gusty conditions or on mixed terrain may want to weigh the 353 NSW's 35–40mm Sawtooth profile as an alternative — the shallower rim is faster in anything beyond a moderate crosswind. The 858 NSW front stands as the starting point for the fastest aero setup Zipp makes for road and triathlon.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Zipp","offers":[{"title":"Default Title","offer_id":44379152973868,"sku":"00.1918.772.000","price":1900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/zipp-858-nsw-tubeless-disc-front-wheel-8339331.jpg?v=1771293436","url":"https:\/\/ricycles.com\/products\/zipp-858-nsw-tubeless-disc-front-wheel","provider":"RA Cycles","version":"1.0","type":"link"}