Wheels and tyres in general will work well if they are monitored for excessive wear or damage. Regular checks of tyre pressures are essential - check when the tyre is cold to avoid reading them when warm and hence falsely high. Under inflation can cause overheating and excessive wear, whereas over inflation causes rapid wear in the centre of the tread, and reduced levels of adhesion. Tyres should be checked for cuts or bulges, especially on the sidewalls, and any embedded objects should be removed as soon as possible to avoid deflation. If there is a puncture, the nail should be marked and the tyre replaced and repaired by a professional. Wheels should be periodically cleaned and inspected for rust or damage as light alloy and steel wheels are easily damaged. Maintaining the balance on each wheel and tyre assembly is very important to ensure that tyres and suspension components do not wear excessively, with imbalance often signaled by vibrations. Wheel balancing can be done on or off the vehicle and if done on the vehicle, the wheel to hub relationship should be marked for proper re-installation. Driving style has a major impact on tyre wear rates and while swapping tyres around can help ensure even wear it can require the replacement of all tyres simultaneously and this can be expensive. Front tyres can wear unevenly from misalignment so that proper alignment according to manufacturer specifications is important. There are legal restrictions about mixing tyre types on a vehicle, especially on the same axle, with certain combinations being allowed. In the UK there are regulations relating to tyre fitting and use and it is a good idea to check the condition of tyres and tread depth with local authorities for the current legal requirements.