153Best 245/25 R21 tires
1 rated tire available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Accelera PHI at 53/100.
25.8″
overall diameter
9.6″
section width
21″
rim diameter
781
revs per mile
Best 245/25 R21 summer tires
1153Conversion
245/25 R21 in inches
| Overall diameter | 25.8″ |
| Section width | 9.6″ |
| Rim diameter | 21″ |
| Sidewall height | 61 mm |
| Circumference | 81.1″ |
| Revolutions per mile | 781 |
Wheels
What rims fit 245/25 R21 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
7.5″
Maximum
8.5″
Rim diameter is fixed at 21″ — only the width varies. Estimated from the 9.6″ section width (70–90% rule).
Sidewall
245/25 R21 — what does it mean?
| Parameter | Meaning |
|---|---|
| 245 | The first number is the section width — 245 mm, or about 9.6 inches across the widest part of the tire. |
| 25 | The second number is the aspect ratio: sidewall height as a percentage of width. At 25%, the sidewall is about 61 mm tall. |
| R21 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 21-inch wheel. |