>>Ever wonder when to replace your worn car tyres? The performance of your car tires is critical to the safety, performance and efficiency of your vehicle; the N.H.T.S.A. estimates that about 400 fatalities annually may have been attributed to tire failures. Most tires are designed to provide similar performance throughout their lives. However, at some point they start to lose performance in terms of their traction and braking ability. Here are a few tips that should help you decide if it is time to start shopping for a new set of tires and avoid spending more than you need to.
>> Understand that the primary function of tread on a tire is to divert water from beneath the tire to improve traction and avoid hydroplaning on wet roads.
>> Look at the tread pattern: "tread wear bars" are small bridges that form between your treads. Look at the tread pattern and you'll see the beginnings of these bars start to form between the treads, or running across the tires. As the tires wear, these bars will become flush (level or even) with the tire's tread. At this point, it's time to replace the tires.
>> Check the tread by using the "penny test.”
>> Use a tread depth indicator or gauge.
>> Know the legal requirements.
>> Make note of any irregular tread wear.
>> Replace the tires at least every 6 years.
• On 4-wheel-drive or all-wheel-drive cars you should replace all four tires if it is recommended in your service manual. Differences in tire diameter, even due to different states of tread wear, can permanently damage differentials.
• If you see uneven wear on a front tire, chances are that the front end is out of alignment. You should have this checked and rotate the tires to the rear if possible (some vehicles have different sizes on front than the rear). The tires from the back should be fine and the uneven tires moved to the rear will start to correct themselves.
• Tires do not wear perfectly evenly, so be sure to insert the coin at several points from the outside to the inside of your tires. Tires generally wear more on the inside but over-inflated tires will wear more in the middle.
• Test all of your tires and if possible, replace them all at the same time. Mismatched tires will not provide the same safety, performance and efficiency as a matched pair will.
• Tires should never rub against your fenders or any other part of your car. If your new tires rub during turns or when going over bumps, they don't fit, no matter how cool they look. Fix this before you suffer a blowout and crash.
• Be careful when rotating tires, and especially when moving tires to different rims. Many modern tires have a specific rotational direction and corresponding rotation method. Refer to your tire manufacturer or dealer for details.
• If you happen to see wires on your tread or notice wear on the sidewalls of the tire, don't even bother with the penny – just get the tire replaced. The wire thing is rare, and even if Abe says the tread is still good, the wires indicate an immediate need for replacement. It happens and it's better to replace the tire than get the blowout as you're speeding along the road.
For read more click here