Sponsored / Discovery Insure Given that the only contact between you and the road when driving are the postcard-sized surfaces of your tyres, their importance can't be understated. Here's a look at how to maintain and change your tyres. Anyone who’s seen how quickly a supercar can slip off a racetrack because of worn-out tyres will know that, no matter how good your car is, its performance largely depends on the quality of its tyres and the grip they provide. So what exactly do these rough bands of rubber do? Basically, tyres have four main jobs: To support the weight of your car