What you need to set up the Magene T300
To ride the Magene T300 you need the following parts. Add a 12-speed cassette on a Shimano/SRAM HG (HyperGlide) body (matching your bike’s drivetrain). You’ll also need the thru-axle adapter for your axle (sold separately).
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Your parts checklist
Cassette
Buy a 12-speed cassette for a Shimano/SRAM HG (HyperGlide) body, matching your bike’s rear-derailleur speed.
Find on AmazonFreehub body
Ships with a Shimano/SRAM HG (HyperGlide) body fitted.
Other freehub bodies you can fit (sold separately) if your bike uses a different drivetrain:
- SRAM XDR Driver Body
Thru-axle adapter
Sold separately — buy the manufacturer’s thru-axle adapter for your axle size.
Find on AmazonMounting your bike
What the Magene T300 actually asks of you, in order — resolved from its own spec, not a generic manual.
- Take the rear wheel off the bike. A direct-drive trainer replaces it entirely.
- Fit the adapter for your axle standard. This trainer covers 130 mm quick-release, 135 mm quick-release, 12 × 142 mm thru-axle and 12 × 148 mm Boost thru-axle, but the adapter is sold separately — check yours before the first ride.
- Fit a 12-speed cassette on the Shimano/SRAM HG (HyperGlide) freehub body, torque the lockring, then lower the bike on and engage the axle. The cassette must match your bike’s drivetrain, not the trainer.
- Spacer rule for the Shimano/SRAM HG (HyperGlide) body: an 11-speed cassette needs none, a 10-speed one needs the 1.85 mm spacer behind it. Getting this wrong is the usual cause of a cassette that will not seat or a lockring that bottoms out early.
- On 12-speed: Shimano road 12-speed fits this HG body, but Shimano 12-speed MTB needs a Micro Spline body and SRAM 12-speed road needs XDR — check which your bike uses before buying a cassette.
- Spin the cranks by hand before you clip in: the chain should run quiet and straight. Noise here almost always means chainline or cassette spacing, not a faulty trainer.