{"product_id":"pro-textreme-carbon-tubular-disc-wheel","title":"PRO TEXTREME Carbon Tubular Disc Wheel","description":"\u003cdiv\u003e\n  \u003cp\u003eThe \u003cstrong\u003ePRO Textreme Carbon Tubular Disc Wheel\u003c\/strong\u003e is a purpose-built time trial and triathlon rear disc wheel from PRO — Shimano's component brand, whose products have been raced at the professional level by Shimano-sponsored teams including Team Sky. This is a single rear wheel designed for tubular tires and rim brakes, built around a Shimano Dura-Ace FH-9000 rear hub and shaped into a mixed flat\/lenticular profile that maximizes aerodynamic efficiency while maintaining rear derailleur clearance. At 1,050g, it sits at a competitive weight for a carbon disc wheel used in professional triathlon and time trial competition.\u003c\/p\u003e\n\n  \u003cp\u003eThe rim is constructed from Textreme, a spread-tow carbon fiber material developed by Oxeon. Where conventional carbon fiber uses woven or braided cloth, spread-tow construction spreads ultra-thin carbon fiber tapes into wide, flat plies before layup. The result is a higher fiber-to-resin ratio, reduced fiber crimp, and a stiffer structure per gram — because straight fibers carry load more efficiently than fibers that change direction through a weave pattern. The monocoque construction shapes the entire disc into a single integrated carbon structure rather than assembling it from separate bonded sections. Textreme is identifiable by its distinctive checkerboard appearance, a direct visual result of the spread-tow method.\u003c\/p\u003e\n\n  \u003ch3\u003eMixed Flat and Lenticular Disc Profile\u003c\/h3\u003e\n\n  \u003cp\u003eThe disc shape on the Textreme uses a mixed flat and lenticular profile — a standard engineering solution for rear disc wheels used with a rear derailleur. The drive side is flat, giving the derailleur clearance at the largest cog on the cassette. The non-drive side is lenticular, the convex profile that reduces aerodynamic drag and generates lift as the wheel spins. The disc gets progressively wider from the rim bed outward: 39mm at 79mm from the rim bed, 46mm at 158mm, and 51mm at the widest point at 237mm from the rim bed. That progressive taper is characteristic of a properly engineered lenticular profile. The 24mm rim bed width puts the tire at the correct width to smooth the aerodynamic transition from tire to wheel — Shimano recommends tubular tires of 24mm or wider for this reason.\u003c\/p\u003e\n\n  \u003ch3\u003eDura-Ace FH-9000 Hub and Compatibility\u003c\/h3\u003e\n\n  \u003cp\u003eThe hub is Shimano's Dura-Ace FH-9000 rear hub, the top-tier production rear hub from Shimano's flagship groupset family. The FH-9000 delivers smooth, consistent bearing performance and a freehub body that accepts standard Shimano HG cassettes for 10- and 11-speed drivetrains, compatible with SRAM cassettes sharing the same spline pattern. The axle is 130mm quick release — the standard spacing for road and TT frames. This is a rim brake wheel for quick release dropouts. It is not compatible with thru-axle frames or disc brake calipers.\u003c\/p\u003e\n\n  \u003cp\u003eBefore purchasing, verify rear triangle clearance on your frame. The lenticular non-drive side profile is significantly wider than a standard rim, and it may not fit all chainstay and seatstay configurations. Shimano recommends measuring the left side of the rear triangle to confirm fitment. The wheel ships with a quick release skewer, valve extender, wheel bag, and a sticker to cover the valve hole. Shimano specifies carbon-specific brake pads for use with this wheel. This item is final sale at RA Cycles and cannot be returned or exchanged.\u003c\/p\u003e\n\n  \u003cp\u003eThe PRO Textreme disc is the choice when maximum rear aerodynamics is the objective and the frame and course conditions support running a full disc. In triathlon, it pairs with a deep-section front wheel for a race-specific build that has been proven at the professional level — delivering the aerodynamic output of a disc wheel with the structural quality of Dura-Ace components at its core.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"PRO","offers":[{"title":"Black \/ Shimano \/ SRAM","offer_id":43516866494508,"sku":"PRWH0042","price":1699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0608\/7684\/9196\/files\/pro-textreme-carbon-tubular-disc-wheel-6307458.jpg?v=1771299022","url":"https:\/\/ricycles.com\/products\/pro-textreme-carbon-tubular-disc-wheel","provider":"RA Cycles","version":"1.0","type":"link"}