Best 315/25 R21 Tires. Rims & Conversion Info

315/25 R21 in inches

315/25 R21 tires diameter is 27.2 inches, section width is 12.4 inches and rim diameter is 21 inches.

What rims fit 315/25 R21 tires?

For each tire size there often there are several wheel sizes. You can't put very wide tires on narrow rims or vise versa. Here is what size of the rims do you need for 315/25 R21 tires:

Rim diameter x rim width

315/25 R21 – what does it mean?

Parameter Meaning
315 The first number shows that the tire has a width of 315 millimeters or approximately 12.4 inches.
25 The second number is the aspect ratio. In this case, it is 25%. It shows the height of the tire from the ground to rim edge, which is 25% of the width or ~ 79mm
R21 The letter R means this tire is radial. Most of all tires nowadays are radial. The number is the tire diameter in inches. It means that tire will fit 21 inch wheels