Reynolds Black Label 327 Pro 148mm Wheelset

The Reynolds Black Label 327 Pro 148mm Wheelset is a 27.5-inch trail wheelset built for riders who want honest performance on demanding terrain — not a wheel that flatters you on smooth flow trails, but one that holds together when the trail gets loose, rooted, and punishing. Reynolds has refined the Black Label line with a clear brief: build a wheel that stays planted, communicates feedback accurately, and doesn't ask you to choose between light and strong.

The asymmetric, hookless rim profile is where that philosophy starts. By offsetting the spoke bed, Reynolds equalizes tension between the drive and non-drive sides — a geometry decision that produces a measurably stiffer, more consistent wheel without adding material weight. The wide, hookless bead channel is designed to seat tubeless tires reliably and hold them at the lower pressures trail riders actually use. Running lower pressure opens up the tire's contact patch, and the wide internal rim width supports that geometry properly rather than pinching the casing into a compromised shape. What you get at the end of it is a tire that behaves the way its manufacturer intended.

Underneath the carbon, Reynolds specifies an Industry Nine Hydra hub front and rear. With 690 points of engagement, the Hydra is one of the most responsive hub mechanisms available — the kind of engagement that matters on technical climbs and off-camber sections where a half-pedal stroke makes a real difference. Sapim CX-Ray bladed spokes complete the build, providing the lateral stiffness you need on hard cornering loads while absorbing enough trail chatter to keep your hands out of the fatigue zone on longer days. At 148mm Boost rear spacing, the 327 Pro fits natively into modern trail and enduro geometry, and the wider hub flange stance improves spoke bracing angles across the board. This is a wheelset that was built with a specific purpose, and it shows.

Design Benefits

1. Asymmetric Rim Geometry: Offsetting the spoke bed equalizes tension across the drive and non-drive sides of the rear wheel — a well-established engineering approach that reduces the spoke tension imbalance inherent in standard rim profiles. The result is a wheel that resists lateral flex under hard cornering loads and holds its true over repeated impacts, without the added weight of brute-force reinforcement.
2. Hookless Tubeless Bead Channel: The hookless design is built around tubeless tire use from the ground up, providing a secure, consistent bead seat that holds at trail-appropriate pressures. Running lower pressure is where tubeless earns its keep on rough terrain, and a rim designed for it — rather than adapted to it — seats tires more reliably and reduces the risk of burping under hard cornering loads.
3. Industry Nine Hydra Engagement: 690 points of engagement means the gap between pedaling and power transfer is effectively eliminated. On technical climbs or off-camber sections where precise application of power matters, that near-instant pickup translates to better traction control and more confident line choices. The Hydra is also a well-proven hub in terms of durability, which matters on a wheel you're likely to put through sustained hard use.
4. Sapim CX-Ray Spoke Build: CX-Ray bladed spokes are widely regarded as one of the better options available for demanding builds — strong enough to handle trail loading, light enough not to add unnecessary rotational weight, and bladed to resist wind-up during tensioning. The build quality at the spoke level has a direct effect on how consistently the wheel holds its tension over time, which is why spoke selection matters beyond the weight number.
5. Boost 148mm Rear Spacing: The 148mm Boost standard widens the rear hub flange stance relative to older 142mm spacing, which improves the spoke bracing angle and contributes to a laterally stiffer rear wheel. It also fits the geometry of virtually every modern trail and enduro frame without adapters or workarounds — the 327 Pro is designed to work with current builds, not around them.

Final Take

The Reynolds Black Label 327 Pro is built for riders who spend real time on technical trail — the kind of riding where a wheel's honesty matters more than its showroom weight. With the Hydra hub, CX-Ray spoke build, and asymmetric hookless rim working together, this is a 27.5-inch wheelset that suits an aggressive, capable rider who wants a trail wheel that earns its keep every time out.