How to take care of your car tyres

Low-profile tires provide better cornering ability than the old 100 percent range - and the markings on a tire give much information. For example, 185/70 VR 15, means the tire is 185mm wide and has a profile 70 on a wheel of 15 inches. The VR means it is suitable for speeds up to 240 kmh.

However, with 50 and lower profile tires, there are some dangers to avoid. To my cost I clipped the curb in my Mercedes SLK and although damage to the rim was negligible, the tire had a small piece torn from the side making replacement necessary.

OK, it's my fault for underestimating the distance from the curb, my only excuse is that the visibility on the SLK is very bad all around. No wonder most owners fit parking radar devices. As a confirmed skinflint, I neglected this option and I am now seriously consider.

Checking all the tires visually at least once a week is recommended and every couple of weeks, they must be verified with a decent tire gauge. On many cars, the SLK included, a warning comes on the fascia to tell you when even a tire has lost pressure. It is then necessary to put in the air.

Low profile must have correct pressures if they are to do their jobs effectively. The tread is flat and too high a pressure can a convex shape. Conversely, under-inflation causes the tread contact patch with a hollow. Both mean a reduced ability to turn and rapid wear.

Make-up and tire design has come to an incredibly long way over the last 20 years or so to keep up with high performance, rapid acceleration and incredible braking of modern vehicles, but the correct pressure is essential.

Fuel economy is a selling point on any vehicle and the tires play an important role in achieving this. Modern tires can be significantly lighter than the previous ones. Rolling resistance is another important factor to consider. As a tire rotates under load the flexible side walls, as does the same tread. Every bit of energy cost of bending and fuel consumption increases. Special compounds have provided a greater reduction in rolling resistance and we all benefit.

What kind of tires you buy should largely depend on the car you drive and how fast you drive. It would be a waste of money to go, for example, a VR rated tires for your old Morris Minor, but it would be a dangerous folly to mount tires with a symbol S (180 kmh) for a car capable of 270 km per hour.

Insurance companies would not welcome a accident claim where high speed was involved, but the tires were unsuitable for her. Used tires can be fitted if the money is rare, but vet them carefully. Get professional alignment checked when new tires are mounted and at least once a year regardless. Review the steps and walls regularly for signs of wear.

Above all, when buying get several quotes. There are often specials available that offer great savings.

Posted in: Auto Accessories