How to Service Your Wheel Bearings (Hubs)
Free speed lives in the hubs. Repack before they rumble.
Hub bearings carry every km you ride. Rumble, drag, or play means service: strip the freehub and end caps, clean and inspect (or replace) the bearings, regrease, and set the preload so the wheel spins free without knocking.
DT Swiss
Star Ratchet / Ratchet EXP — tool-free strip, the modern standard. Uses special ratchet grease.
Torque specs
| Thread-on end caps | hand-tight + tool |
|---|---|
| Preload ring | zero play, free spin |
Manufacturer-claimed — always confirm against your model manual.
Video walk-throughs
Opens a YouTube search — we link out rather than embed unverified videos.
Manuals & documents
Further reading
Mechanic's tips
- Never use normal grease on the ratchet ring — it must be DT ratchet grease or the pawls drag.
- Higher tooth-count upgrade kits drop straight in.
Tools you'll need
Cassette lockring tool + chain whip
Off comes the cassette
Cone spanners
Shimano cup & cone only
5 mm hex / axle tools
End caps + freehub
Ratchet / bearing grease
Use the correct grade
Bearing press / drift
Cartridge replacement
Step by step
- 1
Remove wheel & cassette
Take the cassette off to reach the freehub.
- 2
Pull end caps / freehub
Most modern hubs are tool-free or 5 mm hex.
- 3
Clean & inspect
Check bearings + ratchet ring for wear, pitting, dry grease.
- 4
Regrease
Correct grease on bearings; ratchet grease on the ring teeth.
- 5
Replace worn bearings
Press cartridge bearings out/in; adjust cones on cup & cone.
- 6
Reassemble & preload
End caps back, set preload so it spins free with no play.
- 7
Check
Spin test + wobble test on- and off-bike.
Frequently asked
How do I know if my wheel bearings need servicing? +
Lift the wheel, spin it, and listen: a smooth, near-silent freehub click with no rumble or drag is healthy. Grip the tyre and rock the wheel sideways — any knock at the axle means play, and gritty or crunchy rotation under load means it is time to strip and regrease.
Cartridge or cup-and-cone — does it matter for servicing? +
Yes. Sealed cartridge bearings (most DT Swiss, Chris King, Industry Nine, Novatec) are cleaned and regreased or pressed out and replaced as a unit. Shimano's traditional cup-and-cone hubs use loose balls between adjustable cones, so you get to set bearing preload by hand — more fiddly, but fully rebuildable indefinitely.
Can I just add oil instead of stripping the hub? +
A drop of light oil on the freehub pawls between services is fine maintenance, but it does nothing for the actual wheel-bearing surfaces. Rumble or play needs a full strip, clean and regrease (or bearing replacement) — oiling over dirty, dry bearings only delays the real job.
How often should hub bearings be serviced riding in South Africa? +
Every 8 000–10 000 km or 12 months is the baseline, but fine Highveld dust, coastal salt air and wet Cape winters all shorten that. Ridden hard through mud or grit, check sooner — a 5-minute spin-and-rock test each month will tell you before it turns into a bigger repair.
How we source this
- Steps and tools are the general procedure for each hub family — always cross-check against your exact hub model before starting, since internals differ by generation.
- Torque and preload figures are manufacturer-claimed values pulled from each brand's published service documentation, not independently measured by BikeBuy — always confirm against your specific model's manual before tightening anything.
- Manuals, videos and references link to the brand's own service hub or well-established third-party repair resources (Park Tool); we do not host or modify manufacturer documentation.
- We never fabricate third-party ratings or ratings we cannot verify — safety-relevant preload/torque guidance always defers to the manufacturer, not our own testing.