Best 175/55 R20 tires
We don't have rated tires listed in this size yet — the conversion, rim fitment and comparisons below still apply.
27.6″
overall diameter
6.9″
section width
20″
rim diameter
731.3
revs per mile
Conversion
175/55 R20 in inches
| Overall diameter | 27.6″ |
| Section width | 6.9″ |
| Rim diameter | 20″ |
| Sidewall height | 96 mm |
| Circumference | 86.6″ |
| Revolutions per mile | 731.3 |
The closest flotation size is 33x11.50R20 — 19.7% taller and 66.9% wider. Compare them in the calculator.
Wheels
What rims fit 175/55 R20 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
5″
Ideal
5.5″
Maximum
6″
Rim diameter is fixed at 20″ — only the width varies. Estimated from the 6.9″ section width (70–90% rule).
Fitted from the factory on rims: 20x5.5, 20x6.
Popular comparisons
Sizes often compared with 175/55 R20
Close alternatives — each opens in the tire size calculator.
Sidewall
175/55 R20 — what does it mean?
| Parameter | Meaning |
|---|---|
| 175 | The first number is the section width — 175 mm, or about 6.9 inches across the widest part of the tire. |
| 55 | The second number is the aspect ratio: sidewall height as a percentage of width. At 55%, the sidewall is about 96 mm tall. |
| R20 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 20-inch wheel. |