Tire sizes

Dial in the size on your sidewall to see how big it really is and what else fits.

Popular sizes

Sizes by rim

Truck tires by height

Lifted trucks and off-roaders go by height: 33s, 35s, 37s. Each page lists the inch sizes and the metric sizes that come out about that tall.

Compare two sizes

Thinking about a different size? The tire size calculator shows both tires to scale, the height and width difference and what your speedometer will read. These are the swaps people check most:

All tire size comparisons · Tire size chart · Speed rating chart · Load index chart

Reading a tire size

How do I find my tire size?

It is moulded into the sidewall of the tire, in a code like 225/65R17. The same size is printed on the placard inside the driver's door jamb, which lists what the vehicle came with.

What do the three numbers mean?

The first is the width in millimetres, the second is the sidewall height as a percentage of that width, and the last is the rim diameter in inches. The R between them means radial.

How much bigger can I go?

The usual rule is to stay within 3% of the original overall height. Beyond that the speedometer reads noticeably off, and taller or wider tires may rub. Each size page lists the swaps that stay inside 3%.