Because constant use wears the rubber away from the treads.
Many European cars use 14 inch tires.
There are a variety of companies that sell inexpensive replacement tires for BMW cars. Some of these companies include Tire Rack, etyres, CARiD, Bimmerzone, and many others.
no unless you have parts that need replacement
Fulda Quantum Elite Tires are made in many sizes. You need to determine the size of a cars rims, and the clearance available to determine what cars the tires will fit.
If they are normal cars there will be 104 tires
Michelin is a company that sells many different types of tires, so you should be able to easily order the tires you need. Otherwise, you can purchase Goodyear tires, which also have a good reputation.
It needs air to hold the tire so it can roll.
http://www.expresstire.com/general_car_tire_faqs.shtmlwill tell you all you need to know. Though if your tires are damaged you should probably get them replaced.
Yes, cars need friction between their tires and the road surface to accelerate, decelerate, and turn. Without friction, the tires would not be able to grip the road, leading to the car sliding or skidding uncontrollably.
Since cars were first made tires were always rubber.
A burn out will ruin tires on race cars by burning up the rubber. The rubber of the tires will get worn from the friction of the pavement causing the tires to tear.