265/50R18 Tire Size Specifications & Compatible Vehicles
Overall Diameter
722.2 mm
Section Width
265 mm
Sidewall Height
132.5 mm
Circumference
2268.9 mm
Revs/Mile
709
Rim Diameter
18"
Inch Equivalent
28.4x10.4R18
Rim Width (ETRTO)
7.5" – 10.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 265/50R18 and may be used as replacements:
Understanding 265/50R18
The tire size 265/50R18 means the tire has a section width of 265mm, an aspect ratio of 50% (the sidewall height is 50% of the width), and fits a 18-inch rim.
Sidewall Height = 265 x 0.5 = 132.5 mm
Overall Diameter = (132.5 x 2) + (18 x 25.4) = 722.2 mm
Circumference = 722.2 x π = 2268.9 mm
Overall Diameter = (132.5 x 2) + (18 x 25.4) = 722.2 mm
Circumference = 722.2 x π = 2268.9 mm
Frequently Asked Questions
The 265/50R18 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 265/50R18 tire has an overall diameter of 722.2mm (28.4 inches). The sidewall height is 132.5mm, and the total circumference is 2269mm.
For 265/50R18 tires, the ETRTO recommended rim width is 9.0". 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 265/50R18 722.2mm diameter. Compatible alternatives include 165/65R20, 195/55R20, 295/45R18. Use our Tire Size Calculator to compare any two sizes.