Reynolds Black Label 329 Expert 157mm Wheelset

The Reynolds Black Label 329 Expert 157mm Wheelset is a carbon trail wheel built the way Reynolds builds all of its mountain wheels: from the inside out, in-house, without cutting corners. The 329 Expert sits below Reynolds' Pro tier but uses the same MR5 carbon construction and the same design philosophy — a complete wheel system engineered for the loads and variability of trail riding, not optimized around a single performance metric. At $1,899.99 with 157mm Super Boost+ rear axle spacing, it's aimed squarely at the modern trail and light enduro rider who wants a meaningful carbon upgrade over alloy without reaching for a race-specific Pro build.

The rims are built on Reynolds' MR5 IDM carbon, molded in-house to a low-profile 19mm depth with a 32mm wide channel. That shallow, wide shape is purpose-built for trail riding — it prioritizes tire support and compliance over the aerodynamic depth that benefits road or XC wheels, and it gives 29er tires a stable platform that improves cornering feel and traction on variable terrain. Reynolds places vertical compliance at the center of their mountain wheel design philosophy, treating it as a measurable performance factor rather than a secondary concern, and the low rim profile reflects that. The hookless tubeless rim creates a no-burp fit that's easier to seat and more resistant to roll-off on rough terrain than a traditional hooked bead. The rim is also slightly asymmetric: an asymmetric profile shifts spoke tension toward equilibrium between the drive and non-drive sides, producing a more structurally balanced wheel. That balance shows up as improved durability and consistent feel over the life of the build — characteristics that matter more on a trail wheel than on one that only ever sees smooth pavement.

The hubs are Ringle Super Bubba X, running 4° engagement with a 6-pawl phased ratchet system. Four degrees is tight enough that there's no perceptible dead zone when you re-engage out of a corner or off a technical feature — the freehub picks up immediately without the sluggish lag that plagues lower-engagement designs. The 6-pawl phased layout distributes load across multiple contact points, increasing durability and keeping engagement consistent under repeated hard efforts. The hub ships with SRAM XD and Shimano Microspline freehubs included, covering the two dominant modern drivetrain standards; a Shimano HG freehub body is available for older drivetrains. Both front and rear use centerlock disc brake interfaces.

The 329 Expert is laced with Sapim CX-Ray spokes in a 28-hole, 3-cross pattern front and rear, secured with alloy nipples. CX-Ray is the benchmark for bladed spokes — a double-butted, aerodynamically shaped profile that adds vertical compliance while maintaining lateral stiffness, which is the combination that makes a trail wheel both efficient and forgiving on sustained rough terrain. At 1,605 grams for the pair, the wheelset sits in a weight range that's meaningfully lighter than quality alloy while maintaining the structural integrity needed for aggressive trail use. It's not a weight-weenie spec, and that's appropriate — a trail wheel that's too light is a liability on the kind of terrain these are built for.

Reynolds manufactures its carbon rims in its own facility, giving the company direct control over layup consistency and the confidence to back every rim with a lifetime warranty to the original owner. That kind of guarantee is uncommon in carbon and reflects Reynolds' position that rim durability isn't something that should depreciate with mileage. The 157mm axle spacing makes the 329 Expert a direct fit for Super Boost+ frames across the major trail brands. For any rider on a compatible frame looking to move into carbon without buying more wheel than the terrain requires, the Black Label 329 Expert is a well-matched, well-warranted choice.