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Best 255/55 R18 tires

109 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.

29″
overall diameter
10″
section width
18″
rim diameter
694.4
revs per mile

Best 255/55 R18 all-season tires

42

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

Best 255/55 R18 summer tires

26

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

Best 255/55 R18 winter tires

15

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

More top-rated 255/55 R18 tires

15

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

Best 255/55 R18 all-terrain tires

11
Conversion

255/55 R18 in inches

Overall diameter29″
Section width10″
Rim diameter18″
Sidewall height140 mm
Circumference91.2″
Revolutions per mile694.4

The closest flotation size is 28x12.00R18 — 3.6% shorter and 19.5% wider. Compare them in the calculator.

Wheels

What rims fit 255/55 R18 tires?

A tire fits a range of rim widths. Too narrow or too wide and the sidewall changes shape.

Minimum
7″
Ideal
8″
Maximum
9″

Rim diameter is fixed at 18″ — only the width varies. Estimated from the 10″ section width (70–90% rule).

Fitted from the factory on rims: 18x7.5, 18x8, 18x8.5, 18x9.

Popular comparisons

Sizes often compared with 255/55 R18

Close alternatives — each opens in the tire size calculator.

255/55R18VS235/65R17
255/55R18VS235/60R18
255/55R18VS235/55R19
255/55R18VS255/60R17
255/55R18VS255/50R19
Sidewall

255/55 R18 — what does it mean?

ParameterMeaning
255The first number is the section width — 255 mm, or about 10 inches across the widest part of the tire.
55The second number is the aspect ratio: sidewall height as a percentage of width. At 55%, the sidewall is about 140 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.