235/65R18 Tire Size Specifications & Compatible Vehicles
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:
2025 Cadillac XT5 Luxury 2024 Cadillac XT5 Luxury 2023 Cadillac XT5 Luxury 2022 Cadillac XT5 Luxury 2021 Cadillac XT5 Luxury 2020 Cadillac XT5 Luxury 2021 Infiniti QX60 Pure 2020 Infiniti QX60 Pure 2022 Lexus RX RX 350 2022 Lexus RX RX 450h 2021 Lexus RX RX 350 2021 Lexus RX RX 450h 2020 Lexus RX RX 350 2020 Lexus RX RX 450h 2025 Toyota Highlander LE/XLE 2024 Toyota Highlander LE/XLE 2023 Toyota Highlander L/LE/XLE 2022 Toyota Highlander L/LE/XLE 2021 Toyota Highlander L/LE/XLE 2020 Toyota Highlander L/LE/XLE
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
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.