188Best 255/35 R21 tires
21 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Pilot Sport All Season 4 at 88/100.
28″
overall diameter
10″
section width
21″
rim diameter
719.6
revs per mile
More top-rated 255/35 R21 tires
9188
293
383
486
577
688
772
874
958Best 255/35 R21 summer tires
6
177
277
376
475
574
653Best 255/35 R21 winter tires
4
180
275
375
475Best 255/35 R21 all-season tires
2
188
286Conversion
255/35 R21 in inches
| Overall diameter | 28″ |
| Section width | 10″ |
| Rim diameter | 21″ |
| Sidewall height | 89 mm |
| Circumference | 88.1″ |
| Revolutions per mile | 719.6 |
Wheels
What rims fit 255/35 R21 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7″
Ideal
8″
Maximum
9″
Rim diameter is fixed at 21″ — only the width varies. Estimated from the 10″ section width (70–90% rule).
Fitted from the factory on rims: 21x8.5, 21x9, 21x9.5, 21x10, 21x10.5, 21x11.5, 21x12.
Popular comparisons
Sizes often compared with 255/35 R21
Close alternatives — each opens in the tire size calculator.
Sidewall
255/35 R21 — what does it mean?
| Parameter | Meaning |
|---|---|
| 255 | The first number is the section width — 255 mm, or about 10 inches across the widest part of the tire. |
| 35 | The second number is the aspect ratio: sidewall height as a percentage of width. At 35%, the sidewall is about 89 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. |