Smart trainers for mountain bikes (Boost 12×148)
A modern mountain bike needs a trainer that accepts 12×148 mm Boost thru-axle and a freehub body matching its drivetrain (SRAM XD or Shimano Micro Spline for 12-speed). 24 of 30 trainers in our database support Boost — so MTB compatibility is now near-universal, but confirm the adapter is included and pick the right freehub.
Boost thru-axle, explained
Boost spacing is 148 mm wide — 6 mm more than the 142 mm road/gravel thru-axle — so it needs a Boost-specific end-cap adapter. Most current direct-drive trainers offer one, included or optional. Older 135 mm quick-release MTBs mount in the standard cups instead.
Boost-compatible trainers
The 24 trainers that accept a 12×148 mm Boost thru-axle, and whether the adapter ships in the box:
| Trainer | Boost adapter |
|---|---|
| Wahoo KICKR CORE 2 | Included |
| Wahoo KICKR V6 (2022) | Included |
| Wahoo KICKR MOVE | Included |
| Zwift Hub One | Included |
| Tacx NEO 3M | Included |
| Tacx Flux 2 Smart | Included |
| Tacx Flux S Smart | Sold separately |
| Elite Suito-T | Included |
| Elite Direto XR | Included |
| Saris H3 | Included |
| JetBlack VOLT V2 | Included |
| Wahoo KICKR CORE (1st gen) | Included |
| Tacx NEO 2T | Included |
| Wahoo KICKR V5 (2020) | Included |
| Tacx NEO 2 | Included |
| Zwift Hub (classic) | Included |
| Van Rysel D100 | Included |
| Magene T300 | Sold separately |
| Saris H2 | Included |
| Elite Justo | Included |
| JetBlack WhisperDrive Smart | Included |
| Kinetic R1 | Included |
| Xplova Noza S | Included |
| Van Rysel D500 | Included |
You also need the right freehub
Boost only solves the axle. To fit your cassette you also need the matching freehub body: Shimano Micro Spline for 12-speed Shimano XTR/XT/SLX/Deore, or SRAM XD for SRAM Eagle. Check which bodies each trainer offers on the XD vs XDR and identify-your-freehub guides.