184Best 275/50 R21 tires
9 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Michelin Defender LTX M/S at 95/100.
31.8″
overall diameter
10.8″
section width
21″
rim diameter
633.7
revs per mile
Best 275/50 R21 summer tires
4184
283
381
464Best 275/50 R21 all-season tires
3
195
290
382Best 275/50 R21 winter tires
1
181More top-rated 275/50 R21 tires
1
190Conversion
275/50 R21 in inches
| Overall diameter | 31.8″ |
| Section width | 10.8″ |
| Rim diameter | 21″ |
| Sidewall height | 138 mm |
| Circumference | 100″ |
| Revolutions per mile | 633.7 |
Wheels
What rims fit 275/50 R21 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
7.5″
Ideal
8.5″
Maximum
9.5″
Rim diameter is fixed at 21″ — only the width varies. Estimated from the 10.8″ section width (70–90% rule).
Fitted from the factory on rims: 21x8.5, 21x9.
Popular comparisons
Sizes often compared with 275/50 R21
Close alternatives — each opens in the tire size calculator.
Sidewall
275/50 R21 — what does it mean?
| Parameter | Meaning |
|---|---|
| 275 | The first number is the section width — 275 mm, or about 10.8 inches across the widest part of the tire. |
| 50 | The second number is the aspect ratio: sidewall height as a percentage of width. At 50%, the sidewall is about 138 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. |