255/40R18 Tire Size

Specifications, compatible vehicles, alternative sizes, and comparison links for 255/40R18.

Tire Specifications

255/40R18

Standard Tire Size Notation

255

Section Width (mm)

40

Aspect Ratio (%)

18”

Rim Diameter (in)

Overall Diameter:661.2 mm (26.0”)
Sidewall Height:102 mm (4.0”)
Circumference:2077.2 mm
Revolutions/Mile:775

Compatible Vehicles

No vehicles found for this tire size in our database.

Alternative Tire Sizes

Plus/minus sizing options and same-diameter alternatives based on 255/40R18.

Plus Sizing

265/35R18275/30R18

Minus Sizing

245/45R18235/50R18

Same Diameter

245/40R18265/40R18

Compare Tire Sizes

See the difference between 255/40R18 and another size

Start Comparison