You don't want to wait until you have a tire blowout before you buy new tires for your car. Your vehicle's current tires will tell you when they need to be replaced if you know what to look for. Here are signs you need new tires on your car:
Look at the tire tread on all your tires. You may notice that one or more tires look as if they have ample amount of tread left in them while others look bare on the inner portions. Any tires that have uneven tread on them should be replaced. It's wise to visit your mechanic or tire specialist to inspect your vehicle to see if there is a cause for your tires being uneven, such as poor alignment.
Bubbles in Tread
Bubbles in your tire tread are a sign that your tires need to be replaced quickly. Exposed rubber or threads (the little wire-like lines in your tires) can burst and cause your tire to "blow out" or go flat. Bubbles in your tread will become apparent in the way you drive, making your car operate as if you are driving on icy or bumpy roads. Discontinue driving your car or use a reliable spare tire until you can go to a tire specialist to have your tires replaced.
Tires Going Flat
If your tires are losing air pressure often and you find yourself constantly at the gas station to refill them, then you should consider replacing them. Small leaks or tears can cause your tires to go flat, and the air leak may be so slow you don't recognize it as a serious problem until the tire goes completely flat.
Your tire specialist can repair small damages in your tires if the existing tread is still in good repair, although it is wise to simply replace the tire, so you have a new warranty on the tires. When you have your tires replaced it's best to replace all four tires and use the old tire with the best tread as a reliable spare.
When you replace your car's tires, make sure you have your tires rotated whenever you go in for an oil change or vehicle service. Tire rotation helps preserve your new tires, so they last longer and and don't take a lot of time for your tire specialist to do. Your tire specialist can give you further advice for keeping your new tires in the best condition.