Reynolds Blacklabel ATR 650b Tubeless Disc Wheelset

The Reynolds Blacklabel ATR 650b Tubeless Disc Wheelset is Reynolds' all-terrain carbon wheel built specifically for the 650b format — a size that opens up a wider tire envelope and a more planted, cushioned ride character compared to a standard 700c setup. ATR stands for All Terrain Road: a carbon wheel engineered to perform at road-level standards while handling the full demands of gravel, dirt, and mixed terrain without compromise. The Blacklabel name marks this as Reynolds' flagship line, and the 650b ATR carries the complete technology stack from that program — CR6 carbon layup, the aerodynamically developed rim profile, and hub hardware built in partnership with Industry Nine.

CR6 Carbon and the 40mm ATR Rim

The rim is built using Reynolds' CR6 carbon layup — a construction process developed to address the competing demands of low weight and long-term durability that mixed-terrain riding places on a carbon wheel. The 40mm rim depth reflects Reynolds' RAV (Reynolds Aero Versatility) testing methodology, which evaluates wheel performance across a wide range of real-world wind angles rather than only in optimal straight-line drag conditions. The practical goal is stable, efficient aerodynamic performance across the unpredictable wind angles an open course produces, not peak numbers in controlled conditions. The rim profile uses a wider snub-nosed shape designed to work aerodynamically with larger volume tires. The hooked, tubeless-ready channel measures 23mm internal and 32mm external, accommodating tires comfortably from 28mm through 45mm. Reynolds recommends a maximum tire pressure of 90 psi, which covers both higher-pressure road setups and lower-pressure gravel configurations. The structural integrity of the rim is backed by Reynolds' lifetime guarantee.

Industry Nine Hub: 3-Degree Engagement

The hub is a co-developed Reynolds/Industry Nine unit built around a 3-degree engagement interval with a 6-pawl freehub — a configuration that produces 120 distinct engagement points per revolution. For gravel and all-road riding, fast engagement is a functional advantage rather than a marketing number. On loose, rooted, or technically unpredictable surfaces, riders constantly transition between applying power, backing off to manage traction, and re-engaging. A slow freehub creates a dead zone in that sequence; the I9-designed mechanism reduces it substantially without the maintenance demands of a ratchet-style design. The freehub body is available in Shimano/SRAM 9–11 speed, Campagnolo, or SRAM XD-R — covering the full range of drivetrains in current use on gravel and all-road bikes.

Why 650b on a 40mm Carbon Wheel

The choice of 650b over 700c on a wheel this deep is intentional. At 650b, the same 40mm rim depth pairs with a smaller overall diameter, which allows running genuinely wide tires — up to 47mm and beyond in many frame clearances — while maintaining a rolling diameter comparable to a 700c setup with a narrower tire. The net result is a build that carries considerably more tire volume and cushion than an equivalent 700c wheel while retaining the aerodynamic and structural performance of the Blacklabel line. For riders building a gravel bike aimed at all-day adventure riding, bikepacking, or consistently rough terrain where tire volume matters as much as outright pace, the 650b ATR delivers the Blacklabel advantage in a format tuned for that use case.

Build Specifications

The wheelset runs 20 spokes front and 24 rear — a spoke count that manages stiffness and weight for riders pushing the pace on varied terrain. The brake interface is center lock disc on both wheels. Front axle spacing accepts both 12x100mm and 15x100mm thru-axle formats; the rear is 12x142mm. The complete wheelset weighs 1,456 grams. At $2,299.99, the Blacklabel ATR 650b is positioned as a performance carbon gravel wheel for riders committed to the 650b format who want a wheelset that performs at the level serious mixed-terrain riding demands.