The Roundup – Tire Size, Speed Rating & Load Index
What tire size do you have on your vehicle?
ASPECT RATIO (RATIO %)
The aspect ratio measures the height of the sidewall as a percentage of the tire width. For example, a tire size 205/65 R16 has an aspect ratio of 65, meaning the sidewall height is 65% of the tire width.
SIZE, SPEED RATING & LOAD INDEX TIRE WIDTH (MILLIMETRES)
RIM DIAMETER (Inches)
LOAD INDEX (Number)
SPEED RATING (Letter)
A tire’s speed rating indicates the fastest speed it can handle before it no longer performs as designed. Here, V = 240km/h!
Where can I find my tire size?
There are two main places where you can find your tire size;
- On the sidewall of your tire
- On the inside frame of the driver-side door
You can also visit our website and search by vehicle. By selecting the year, make, model and sub-model of your vehicle, our website will provide the tire size included as original equipment on your car.
Still uncertain? Just contact our team, and we will be happy to help!