What you might be seeing
- Steering wheel shimmy at motorway speed
- Shudder only when braking
- Rocking at idle, smooth once moving
- Shake under acceleration
The likely causes, honestly ranked
- Wheel balance or a shifted wheel weight (speed shimmy)
- Warped or worn brake discs (braking shudder)
- Misfire or tired engine mounts (idle)
- Driveshaft or inner CV joint (acceleration)
Do this now
- Write down exactly when it happens and at what speed
- Check tyres for bulges, flat spots or a lost balance weight
- Book the pattern with a local garage — a good description halves the diagnosis
What to avoid
- Ignoring a braking shudder — braking parts are not where you gamble
- Balancing wheels repeatedly when the real fault is a bent rim or worn suspension component
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Frequently asked questions
Why does my steering wheel shake at 100–120 km/h?
Classic wheel balance territory, sometimes a bent rim or tyre fault. A balance check is quick and cheap — start there.
Why does it shake only when I brake?
Usually disc thickness variation or heat spots — felt through the pedal or wheel. Discs and pads are a measured, quotable fix.
Is a shaking idle serious?
It ranges from a worn mount (annoying) to a misfire (fix soon — unburned fuel damages the catalyst). If the engine light flashes with it, stop driving and get help.
Written and reviewed by the Escargo team · Updated 9 August 2026 · Escargo shows real local businesses only — where none is listed yet, the page says so honestly.