Question by Martin R: (MM) size of a 305/40/22 need it so I can put size on Edge Programmer?
I cant find the mm size of an 305/40/22 and need help so i can set in the programmer??

Best answer:

Answer by Frankie
It is in mm.

The first thing your size will start with is a letter. This letter is typically a P which stands for passenger tire.

Next will be a number which represents the width of the tire in millimeters. An example of this is 305.

The second number of the tire size represents the ratio of height to width (aspect ratio). This will be a number 40 – 70 (in your case 40) for a typical passenger car.

You will have a letter seperating the numbers which is usually an R which stand for Radial

The number after the R in the previous step shows your diameter of wheel in inches. This number will vary from 13-22 (22 in your case). Basically its the size of your rims for the tire

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