—— MTB Boost Hub System ——
Engineered for all-mountain and enduro wheel builds, the M340-6B pairs a PG Ratchet freehub with Boost axle spacing for those who need consistent, repeatable specs across every set they lace.
01 / Front Hub
A 15×110mm Boost front hub machined to consistent tolerances, so every wheel you build rolls out true and quiet.
Alloy selection and flange geometry are set for a balance of stiffness and weight that holds up over repeated hard landings — not just on a first-build spec sheet.
02 / Rear Hub
The PG Ratchet freehub and reinforced bearing set are built for the torque and side-loading that a rear MTB hub takes on technical terrain.
Built-in professional PG Ratchet Driving System, sensitive engagement, efficient power transmission for mountain cycling.
Material selection is matched to what each part of the hub actually has to withstand.
Used for the hub shell, where the priority is a stable balance of strength, weight, and vibration damping over the life of the wheel.
Reserved for the freehub body and axle, the two parts carrying the highest stress, where fatigue resistance matters more than shaving grams.
For wheel builders speccing a full build — every number a lacing plan needs, in one place.
| Specification | Front | Rear |
|---|---|---|
| Spoke holes | 32H | 32H |
| Spoke system | J-bend | |
| Bearings | 2 × 6902 | 4 × 15267 |
| Axle × OLD | 15 × 110mm | 12 × 148mm |
| Brake interface | 6-Bolt | |
| Freehub | — | Shimano HG, XD, MS |
| Driving system | — | PG Ratchet |
| Weight | 409 ± 5g / set | |
The M340-6B is supplied as a matched front/rear set, with the freehub and spoke drilling confirmed before it ships — so what arrives on the bench matches what was ordered.
