Damage to a tyre sidewall or carcass can make the tyre useless, even though the tread is hardly worn. A major cause of damage to wheels and tyres is debris on the road - such as pieces of broken silencer and objects dropped from trucks and lorries.
Cars with front-wheel drive have front-wheel bearings that resemble closely those in the rear wheels of rear-wheel-drive cars which have independent suspension (See How car suspension works).
The hubs of the driven wheels often look similar to those of undriven ones,
but there are some differences in the way they are constructed because the
driven hubs have to incorporate drive shafts too.
The original wheels fitted by your car manufacturer may be rather plain or
they may have become scratched, rusty and dirty with age. But there are several
things you can do to improve their appearance and the overall look of the