183Best 215/50 R18 tires
10 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Goodyear Assurance WeatherReady 2 at 88/100.
26.5″
overall diameter
8.5″
section width
18″
rim diameter
762.1
revs per mile
Best 215/50 R18 all-season tires
4183
280
474More top-rated 215/50 R18 tires
3
188
284
Best 215/50 R18 winter tires
2
180
275Best 215/50 R18 summer tires
1
173Conversion
215/50 R18 in inches
| Overall diameter | 26.5″ |
| Section width | 8.5″ |
| Rim diameter | 18″ |
| Sidewall height | 108 mm |
| Circumference | 83.1″ |
| Revolutions per mile | 762.1 |
The closest flotation size is 28x12.00R18 — 5.8% taller and 41.8% wider. Compare them in the calculator.
Wheels
What rims fit 215/50 R18 tires?
A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.
Minimum
6″
Ideal
7″
Maximum
7.5″
Rim diameter is fixed at 18″ — only the width varies. Estimated from the 8.5″ section width (70–90% rule).
Fitted from the factory on rims: 18x6.5, 18x7, 18x7.5.
Popular comparisons
Sizes often compared with 215/50 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
215/50 R18 — what does it mean?
| Parameter | Meaning |
|---|---|
| 215 | The first number is the section width — 215 mm, or about 8.5 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 108 mm tall. |
| R18 | R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 18-inch wheel. |