235/65R18 Tire Size Specifications & Compatible Vehicles

763mm153mm235/65R18Width: 235mm (9.3")
Overall Diameter
762.7 mm
Section Width
235 mm
Sidewall Height
152.8 mm
Circumference
2396.1 mm
Revs/Mile
672
Rim Diameter
18"
Inch Equivalent
30x9.3R18
Rim Width (ETRTO)
7.0" – 9.0"

Compatible Vehicles

The following vehicles use 235/65R18 tires from the factory:

Alternative Tire Sizes

These tire sizes are within 3% overall diameter of 235/65R18 and may be used as replacements:

Popular Comparisons

See how 235/65R18 compares to other common tire sizes:

Understanding 235/65R18

The tire size 235/65R18 means the tire has a section width of 235mm, an aspect ratio of 65% (the sidewall height is 65% of the width), and fits a 18-inch rim.

Sidewall Height = 235 x 0.65 = 152.8 mm
Overall Diameter = (152.8 x 2) + (18 x 25.4) = 762.7 mm
Circumference = 762.7 x π = 2396.1 mm

Frequently Asked Questions

The 235/65R18 tire size is used on 20 vehicle trims including the 2025 Cadillac XT5, 2024 Cadillac XT5, 2023 Cadillac XT5 and 17 more.
A 235/65R18 tire has an overall diameter of 762.7mm (30.0 inches). The sidewall height is 152.8mm, and the total circumference is 2396mm.
For 235/65R18 tires, the ETRTO recommended rim width is 8.0". The acceptable range is 7.0" minimum to 9.0" 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 235/65R18 762.7mm diameter. Compatible alternatives include 175/80R19, 255/50R20, 165/85R19. Use our Tire Size Calculator to compare any two sizes.

Related Tools