182Best 275/45 R18 tires
13 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Kumho Majesty 9 Solus TA91 at 85/100.
27.7″
overall diameter
10.8″
section width
18″
rim diameter
726.9
revs per mile
Best 275/45 R18 summer tires
9182
283
379
479
576
870
966Best 275/45 R18 winter tires
2
180
Best 275/45 R18 all-season tires
1
185More top-rated 275/45 R18 tires
1
184Conversion
275/45 R18 in inches
| Overall diameter | 27.7″ |
| Section width | 10.8″ |
| Rim diameter | 18″ |
| Sidewall height | 124 mm |
| Circumference | 87.2″ |
| Revolutions per mile | 726.9 |
The closest flotation size is 28x12.00R18 — 0.9% taller and 10.8% wider. Compare them in the calculator.
Wheels
What rims fit 275/45 R18 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 18″ — only the width varies. Estimated from the 10.8″ section width (70–90% rule).
Fitted from the factory on rims: 18x9, 18x9.5, 18x10.
Popular comparisons
Sizes often compared with 275/45 R18
Close alternatives — each opens in the tire size calculator.
Sidewall
275/45 R18 — 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. |
| 45 | The second number is the aspect ratio: sidewall height as a percentage of width. At 45%, the sidewall is about 124 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. |