Check your tires regularly for damage in the form of cuts or bulges, especially in the sidewalls. Remove the wheels periodically and clean the inside and outside surfaces of dirt. Inspect the inside sidewalls of the wheel rim for signs of rust, corrosion or other damage. Lightweight wheels with alloy wheels are easily damaged when driving over a curb; steel wheels can also become bent. Installing a new wheel is often the only way to repair serious damage.
New tires should be balanced in the installed position, but may need to be rebalanced as they wear. Unbalanced tires will wear faster, as will steering and suspension components. Wheel imbalance usually manifests itself as vibration, especially at certain speeds (usually about 80 km/h). If this vibration is felt only through the steering, then it is likely that only the front wheels need to be balanced. However, if the vibration is felt throughout the entire vehicle, the rear wheels may also be unbalanced. Wheel balancing should be performed at a service station.
Tread depth - visual inspection
1. New tyres have tread wear safety stripes (B) which will appear when the tread depth reaches approximately 1.6 mm. The stripe positions are indicated by a triangular mark on the tyre sidewall (A).
Tread depth - manual control
2. Tread wear can be monitored with a simple, inexpensive device known as a tread depth gauge.
Tire pressure monitoring
3. Check tire pressures regularly when tires are cold. Do not adjust tire pressures immediately after using the vehicle.
[Content source: the specified website: AUDImanual.ru]