When you last bought tyres for your car, how much thought did
you put into the process? Not very much is the most likely answer. The trouble is, rubber is usually replaced in an emergency
– you’ve had a puncture or noticed a bald patch, and want the job
done quickly and conveniently.

However, tyres are vital safety aids – they provide the only contact your car has with the road – so making a mistake can be lethal. But with more than 280 brands, and a huge choice of fitters, where do you start? First up, you need to know your sizes.