Reynolds Blacklabel Enduro 27.5 Boost Wheelset

The Reynolds Blacklabel Enduro 27.5 Boost Wheelset is built around a specific performance requirement: 27.5-inch wheels for riders who prioritize control and durability on aggressive terrain over outright weight savings. Reynolds' Blacklabel Enduro line addresses the demands of enduro riding directly — longer descents, harder landings, and the need for a wheel that absorbs punishment across a full stage without compromising. At 1,660 grams a pair, the Blacklabel Enduro 27.5 pairs MR5 carbon rims with Reynolds' own TR3 mountain hubs and Sapim CX-Ray spokes: a coherent build where each component is matched to what enduro riding actually asks of a wheel.

MR5 Carbon Rim — 28mm Internal, 29mm Deep

The rims use Reynolds' MR5 construction, a layup process that applies five distinct carbon fiber types across different structural zones within the rim. Each zone — the bead wall, spoke bed, bridge section, tire channel, and sidewall — is optimized independently for the property most relevant to it: stiffness where direct load transfer matters, compliance where impact absorption is the priority, and weight reduction where the structure allows it. At the rim level, that translates to 29mm of depth, 28mm internal width, and 34mm external width — a profile shaped for the 2.4" to 2.6" tires that enduro riders run, where a wider channel properly supports the casing and allows lower running pressures without burping. The hookless bead design pairs with tubeless tire setups for an airtight interface that holds up to the hard cornering and repeated impact loads of enduro descents. The rim is also asymmetric: the spoke bed is offset from center, equalizing tension between drive and non-drive sides for a stronger, more fatigue-resistant wheel structure over the long term.

Reynolds TR3 Hubs — 3 Degree Engagement, Center Lock

The TR3 is Reynolds' own precision-machined mountain hub, produced to 100% machined tolerances rather than cast or forged. The 6-pawl freehub provides 3 degrees of engagement — fast enough for the frequent power transitions of enduro riding, where picking up quickly out of a pumped section or off a landing matters. Disc brakes interface via Center Lock rather than 6-bolt, which improves heat dissipation under the prolonged braking loads of long enduro descents and simplifies rotor swaps in the field. Boost thru-axle spacing front and rear fits the wide-stance geometry of modern enduro frames. Freehub bodies are available in Shimano HG/Microspline and SRAM XD, covering the range of current 11- and 12-speed enduro drivetrains from both major manufacturers.

Sapim CX-Ray Spokes and Asymmetric Build

Reynolds builds the Blacklabel Enduro 27.5 with 28 Sapim CX-Ray spokes per wheel, laced 3x front and rear with external alloy nipples. CX-Ray is a bladed, butted stainless steel spoke used across Reynolds' Blacklabel enduro and trail line for its combination of tensile strength and vertical compliance — the spoke absorbs some of the impact rather than transmitting it directly to the hub or rim. That compliance matters more on an enduro wheelset than on a trail or XC build, where the repeated high-energy hits from rock gardens, drops, and rough chutes can fatigue lesser spokes over time. The asymmetric rim design works with the 3x spoke pattern to equalize tension across the wheel, producing consistent stiffness and a build that holds true under sustained load.

Built for Enduro, Backed for Life

The Blacklabel Enduro 27.5 ships with 45mm tubeless valve stems and end caps included — tubeless-ready from the first ride without additional hardware. Reynolds produces all of its wheels in-house to proprietary engineering specifications, which underpins the lifetime warranty they offer to the original owner. That manufacturing commitment is meaningful on a wheelset being used for enduro: the rims are not outsourced, the tolerances are controlled, and the warranty reflects genuine confidence in the construction. The 27.5" format suits riders on dedicated enduro builds or the rear wheel of a mullet setup, where the smaller diameter delivers quicker, more maneuverable handling through tight and technical terrain. At $2,299.99, the Blacklabel Enduro 27.5 is a premium but coherent answer for a rider who needs a carbon enduro wheelset they can trust.