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Writer's pictureRichard Owusu

Tire 101: Know and understand the size of your tire.

Updated: Mar 3, 2020

INTRODUCTION

It is interesting to note that a lot of people do not know the size of their car tire. They leave that job to their mechanic or the tire shop attendant to help them out when they decide to purchase some themselves. At K3 Mega, we believe that one of the essential awareness you should have about your car is the tires. Your tires are the only point between your car and the road. It is the only part of your car that touches the ground. That is why we believe it should be one of your top list for safety.


HOW TO READ AND UNDERSTAND YOUR TIRE SIZE


Most of the tire sizes are in three series of digits. The size of the tire in this photo is 195/55 R15, which you will find written at the side wall of your tire. The first series of digits, which is 195 in the photo, tells you about the size of the overall width of the tire in milliliters. The second series of digits which is 55 is the aspect ratio or profile. And that is expressed as the percentage of the overall width size (55% of 195). This will tell you the side wall height in milliliters. For example, the picture above which has the tire size 195/55 R15 will give you an actual side wall height of 195/100x55 = 107.25mm. So the height of the side wall is 107.25 milliliters. The next series of digits which is 15 expresses the diameter of the rim/wheel in inches. The letter R that comes before 15 stands for radial construction.


Picture source: freshmotorcare.co.uk


Picture source: ikperformance.co.uk

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