How to Find the Overall Diameter of a Tire

Updated 09/10/2018 | Published 09/08/2018

Question:

I measured my spare tire at 32 inches...is that the size cover I would buy?

asked by: Dawn

Expert Reply:

It can be rather hard to measure a tire so the most accurate way to find the overall diameter which is used to determine the correct spare tire cover would be with a bit of calculations. I have attached these calculations for you in the form of a photo. Don't forget to take the section height and multiply by two, then add the diameter of the wheel. This will then be used to find the correct spare tire cover which I have attached a list of for you.

If you do not feel like doing the calculations then please provide me with your full tire size and I would be happy to do them for you.

expert reply by: Conner L