Buying Tyres: 3 Terms You Need to Know and Understand

Tyres play a vital role in your vehicle's road performance. The tyres on your car help to cushion the rest of the vehicle from the shocks caused by dips and bumps in the road surface, helping to create a smoother ride as well as reducing the amount of wear and tear. Your tyres also play a key role in ensuring your car properly steer your vehicle. Because tyres are so vital, it is important that you are familiar with some auto service terms of the trade when shopping for replacement tyres. Below is a guide to 3 terms you may commonly come across when at the tyre shop.

Speed rating

Every tyre has what is known as a speed rating. The speed rating is the maximum speed that the tyre can operate at safely. However, the speed rating is not listed as a number but rather a letter. For example, the letter P represents a maximum safe speed of 150km/h, and the letter Y represents 300km/h. You should consult with a tyre mechanic when choosing your tyres to ensure you purchase tyres which have the correct speed rating. If you fit tyres with an incorrect speed rating, driving your car could be dangerous.

Aspect ratio

The aspect ratio refers the width and height of the tyre. Depending on what you plan to use your vehicle for or the type of terrain you wish to drive on, tyres with one aspect ratio may be better than another. For example, if you do a lot of road driving, a tyre with a lower aspect ratio will offer better handling, especially in bad weather conditions. However, tyres with a lower aspect ratio are generally more expensive than those with a higher one, so for everyday use, you may wish to choose a high aspect ratio. A qualified auto mechanic will be able to offer further advice.

Run-flat 

Run-flat refers to a type of tyre which is specially designed to continue working when it has suffered a puncture. A standard tyre will deflate as soon as its membrane is pierced, whereas a run-flat contains durable rubber side panels, which allow the casing to continue functioning after a puncture. However, this doesn't mean you will never have to change a run-flat tyre as they are only designed to get you to the safety of your home or the nearest auto repair shop.

If you would like further help and advice, you should contact an auto tyre specialist.