[hadeline]

The most important things to remember when purchasing new tires.
1) Make sure they are the right size for your car
2) have your new wheels balanced
3) have them do an alignment
The next step is to avoid damaging your tires
1) Do not hit the curb, this wrecks the wall of the tire and causes leakage
2) Check the air pressure regularally
I also suggest you look into a product called Tire Safety Solution, it works great. This product saved my mothers life and I use it, as well. It seals the tire to the rim, preventing air leakage and from going flat when you run over a nail etc..., 1 bottle does all 4 tires.
Any questions please contact me or view my sites.
Roberta
P.S. Used tires are a waste of money, because they do not last.