A nail or screw through a tyre not only causes gradual deflation, but the point may damage the interior wall as the tyre flexes against it, leading to eventual fracture of the carcass. A tyre with a sidewall penetration cannot be repaired satisfactorily.
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 most common way of transmitting drive from the drive shaft to the
hub is by splines grooves machined for a few inches along the end of the
shaft which engage with matching grooves inside the hub.
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