255/60R18 Tire Size Specifications & Compatible Vehicles
Overall Diameter
763.2 mm
Section Width
255 mm
Sidewall Height
153.0 mm
Circumference
2397.7 mm
Revs/Mile
671
Rim Diameter
18"
Inch Equivalent
30x10R18
Rim Width (ETRTO)
7.5" – 10.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 255/60R18 and may be used as replacements:
Popular Comparisons
See how 255/60R18 compares to other common tire sizes:
Understanding 255/60R18
The tire size 255/60R18 means the tire has a section width of 255mm, an aspect ratio of 60% (the sidewall height is 60% of the width), and fits a 18-inch rim.
Sidewall Height = 255 x 0.6 = 153.0 mm
Overall Diameter = (153.0 x 2) + (18 x 25.4) = 763.2 mm
Circumference = 763.2 x π = 2397.7 mm
Overall Diameter = (153.0 x 2) + (18 x 25.4) = 763.2 mm
Circumference = 763.2 x π = 2397.7 mm
Frequently Asked Questions
The 255/60R18 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 255/60R18 tire has an overall diameter of 763.2mm (30.0 inches). The sidewall height is 153.0mm, and the total circumference is 2398mm.
For 255/60R18 tires, the ETRTO recommended rim width is 8.5". The acceptable range is 7.5" minimum to 10.0" maximum. Using a rim outside this range can cause improper bead seating and unsafe handling.
Yes, as long as the replacement tire overall diameter is within 3% of the 255/60R18 763.2mm diameter. Compatible alternatives include 195/85R17, 255/65R17, 165/85R19. Use our Tire Size Calculator to compare any two sizes.