How can you tell if your wheels are out of balance?
More and more drivers are told that vibrations in their car are caused by the wheels. They are often right, but there can be more causes than just one unbalanced wheel. It’s worth knowing what you can check yourself and what you should leave to a garage.
What symptoms indicate that the wheels are out of balance?
Vibrations in the steering wheel or bodywork most commonly occur at certain speeds.
Vibrations are usually felt on the steering wheel when the front wheels are affected, and on the seat or floor when the problem concerns the rear wheels. The following may also occur:
- a steady hum that increases in volume as the speed increases,
- a slight ‘bouncing’ of the car on a smooth road,
- treading indentations or uneven tyre wear,
- loose or missing weights on the rim,
- marks on the rim caused by contact with the kerb.
Why does vibration occur at certain speeds?
Because an unbalanced wheel vibrates most strongly within its resonance range.
A slight imbalance in mass increases with the speed of the wheel and, within a certain speed range, causes noticeable vibrations. Once this range is exceeded, the vibrations may diminish, but the problem does not disappear. Factors such as the wheel diameter, the mass of the tyre and rim, tyre pressure and the condition of the suspension all play a role. This is why two different speeds can feel quite different on the same road.
How can you spot uneven wear on tyres and rims?
Look for signs of wear, steps and bulges on the tread, and for any warping of the rim.
Run your hand along the tread. If you can feel alternating sharp and smooth edges, this is tread irregularity. Unilateral edge wear indicates a problem with the wheel alignment, but vibrations are caused by unbalanced wheels. Look out for:
- bulges on the side of the tyre following an impact,
- cracks or chips in the rim,
- a warped rim, visible when the wheel is turning slowly,
- traces of overheating and rubber delamination.
A damaged wheel rim or tyre needs to be repaired or replaced. Wheel balancing alone is not enough.
Can play in the suspension be mistaken for a problem with the wheels?
Yes. Loose parts can cause similar vibrations and noises.
Worn tie-rod ends, pins, control arm bushings or wheel bearings transmit vibrations and impair handling. Imbalance usually becomes apparent within a narrow speed range and on a smooth road. Play is more often heard as knocking noises over bumps and felt as imprecise handling. If the steering wheel shakes when braking, this is more often caused by the brake discs than by wheel balance.
How can you check whether your wheels are balanced without specialist equipment?
At home, you can only narrow down the problem to some extent.
Check your tyres. Make sure none of the balance weights are missing, that the rims aren’t dented, and that there’s no dried mud or ice on the rims. Measure and top up the tyre pressure in accordance with the car manufacturer’s recommendations. Take a short test drive on a flat road and note the speed range at which vibrations occur. You can swap the front and rear wheels round and check whether the vibrations have moved from the steering wheel to the bodywork, or vice versa. This will indicate which axle is at fault. However, a precise diagnosis is provided by a wheel balancer, and in difficult cases, by wheel balancing combined with a road test.
What are the risks associated with erratic driving?
Reduced control over the car and faster wear and tear on components.
Prolonged vibrations damage tyres, bearings, shock absorbers and suspension components. They can reduce traction when cornering and increase braking distances on uneven surfaces. They increase driver fatigue and the risk of error. Fuel consumption often increases too, as the wheel loses its smooth rolling action.
When should you take your car to a garage if you suspect there is a problem with the wheels?
When the tremors are pronounced, recurrent and do not subside following routine checks.
A service is recommended after hitting a pothole or kerb, after fitting new tyres, or following a seasonal tyre change. If you notice uneven tread wear, hear knocking noises or feel the car wobble when cornering, a full diagnostic check is required. In many cases, wheel balancing with a road test proves effective. Wheel straightening restores the shape of the rims and reduces vibrations, though it does not guarantee specific results in every case. We also offer servicing for wheels fitted with TPMS sensors and a mobile service that comes to your car.
What information should you give the mechanic before the test?
The more detailed the description, the quicker the diagnosis.
Prepare:
- the range of speeds at which vibrations can be felt,
- the place where the vibrations are felt, i.e. the steering wheel, the seat, the floor,
- the moment the problem occurred and the circumstances, e.g. hitting a kerb,
- wheel type and tyre size,
- information about TPMS sensors and any warning messages,
- the date of the last tyre rotation and wheel alignment,
- a list of recent suspension and brake repairs,
- observations regarding tyre wear and any photographs.
This makes it easier to choose the right method, such as standard wheel balancing, wheel balancing with a road test, or wheel straightening.
A smooth, quiet ride is not a matter of luck, but depends on the condition of the wheels and suspension. A quick response to vibrations protects your tyres, enhances comfort and improves safety. If you have any doubts, don’t put off having your car checked. Sometimes all it takes is a wheel balance adjustment, whilst at other times a rim repair or a suspension check is needed. A conscientious driver spots the signs early on and drives more calmly.
Book an appointment at our service centre in Warsaw or place an order mobile tyre repair service and restore a smooth ride to your tyres.