car vibration at high speed Page 8747

Got a shimmy above 90–110 km/h? That’s your car politely hinting something’s out of round, out of balance, or past its prime. Start with tyres: check pressures, inspect for bulges or flat spots, then get a proper wheel balance and rotate front to rear. If the shake changes under braking, think warped rotors; if it’s speed‑dependent and constant, suspect wheels, tyres, or driveline rather than alignment alone. Still buzzing? Get a mechanic to check suspension bushes, wheel bearings, engine/gearbox mounts, and the driveshaft—because guessing at 100 km/h is a hobby best left to ghosts.

• Unbalanced or damaged tyres/rims
• Bent wheel or out‑of‑round tyre
• Worn suspension components (control arm bushes, ball joints, tie rods)
• Wheel bearings or CV joints/prop shaft issues
• Brake rotor thickness variation (if only when braking)
• Poor alignment accelerates wear but rarely causes a pure high‑speed shimmy