The tyre fitter will use this information to match your car to the correct size of tyre. If you require special capabilities such as winter-specific tyres, ask the tyre fitter if they stock tyres that will meet your needs. When ordering tyres over the phone or online, use these numbers to order the correct size to fit your vehicle.
Always have tyres fitted by a professional tyre fitter. This is because tyre fitting can be dangerous both when fitting the tyres and when the tyres are used on the road, if done incorrectly.