You can find your tires' speed rating and load index listed on the sides of the tires. From there, you can use this guide to understand what those numbers mean: http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=35
You know that is a very good question. Although there are diffrent things to cars in this ecenomy
The tire speed ratings are used to tell drivers the top speed that a tire can go. Speed ratings are generally much higher than legal speed ratings.
Look along the tire rim.
Lots of different cars, and why would you even want to know the answer to this question. If you have a specific car in mind list it.
No
.If not in those places look at Tire-rack.com. Tire-rack.com has a great variety of tires and gives a whole page full of details on tire ratings and explains them really well.
If you are rying to locate the size tire your vehicle I would consult my owners manual. There should be a specific size, make and model that you require. All cars do not use the same size tires, different size cars use different sizes.
From a garage or a tyre shop.
That is not a tire size.
There are no "tire laws" for used car dealers.
Car tires are not too difficult to change, if you know what you are doing and have the proper tools. You will need a jack and a tire iron. Most cars come with the proper equipment for changing a tire. Many also have instructions included with the jack.
sedan and muscular cars