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Best 275/65 R18 tires

117 rated tires available in this size, scored on dry, wet, snow, comfort and wear. Top overall right now is the Cooper Discoverer AT3 4S at 94/100.

32.1″
overall diameter
10.8″
section width
18″
rim diameter
628.8
revs per mile

Best 275/65 R18 all-terrain tires

53

41 more rated tires in this size are listed on their brand pages.

Best 275/65 R18 all-season tires

24

12 more rated tires in this size are listed on their brand pages.

More top-rated 275/65 R18 tires

20

8 more rated tires in this size are listed on their brand pages.

Best 275/65 R18 winter tires

10

Best 275/65 R18 mud-terrain tires

9

Best 275/65 R18 summer tires

1
Conversion

275/65 R18 in inches

Overall diameter32.1″
Section width10.8″
Rim diameter18″
Sidewall height179 mm
Circumference100.8″
Revolutions per mile628.8

The closest flotation size is 33x10.50R18 — 2.9% taller and 3% narrower. Compare them in the calculator.

Wheels

What rims fit 275/65 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: 18x7.5, 18x8, 18x8.5, 18x9, 18x10.

Popular comparisons

Sizes often compared with 275/65 R18

Close alternatives — each opens in the tire size calculator.

275/65R18VS255/75R17
275/65R18VS275/70R17
275/65R18VS255/70R18
275/65R18VS255/65R19
Sidewall

275/65 R18 — what does it mean?

ParameterMeaning
275The first number is the section width — 275 mm, or about 10.8 inches across the widest part of the tire.
65The second number is the aspect ratio: sidewall height as a percentage of width. At 65%, the sidewall is about 179 mm tall.
R18R means radial construction, which nearly all modern tires use. The number is the rim diameter in inches — this tire fits a 18-inch wheel.