Tire
From Wikipedia, a free encyclopedia written in simple English for easy reading.
Tire (British tyre) is the part of the wheel which is made of rubber. There are tires on many vehicles, such as cars, airplanes, bicycles, wheelbarrows and other things that need to move around smoothly.
Tires need to be changed after the tread has been worn away. Driving/riding on worn tires is very dangerous, and will lead to blowouts and loss of control. They are made of various compounds of rubber, softer for summer/traction oriented tires, and harder composites for long lasting performance. There are many brands and tread options.
Most all tires on the road today are tubeless. There are grooves in the wheel that allow the tire to be popped into place and hold a lot of air pressure. With a crack in your wheel, there is no hope of holding air. Getting a leak in your tire is very common. The most common cause, is a puncture from a nail or screw. This can usually be cured by patching the inside of the tire so that it can hold air again. If you get a puncture close to or in the sidewall (side of tire), it cannot be repaired. This is because the tire flexes in this area to support the weight of the vehicle, and a patch will not hold up to the stress.
There are many different sizes of tires. They are marked with 3 numbers and might look like: 225/60R16. The first number is measured from one bead, over the tire to the next. In other words, from one side of the rim, over the tire, to the next. The second number measures the height, from the rim to the top of the tire. These 2 numbers together will give you the width. The last number is the rim size. If you have 15" wheels, you better get some 15" tires or they will not fit on your rims!
That is not correct. The first number is the section width in millimeters (the widest point of the tire when mounted and inflated), the second number is the sidewall height as a ratio of the width (so, in this case, the sidewall would be 225 * .60 = 135mm), the last number is the wheel diameter in inches.
