235/35R18 Tire Size Specifications & Compatible Vehicles
Overall Diameter
621.7 mm
Section Width
235 mm
Sidewall Height
82.3 mm
Circumference
1953.1 mm
Revs/Mile
824
Rim Diameter
18"
Inch Equivalent
24.5x9.3R18
Rim Width (ETRTO)
7.0" – 9.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 235/35R18 and may be used as replacements:
Understanding 235/35R18
The tire size 235/35R18 means the tire has a section width of 235mm, an aspect ratio of 35% (the sidewall height is 35% of the width), and fits a 18-inch rim.
Sidewall Height = 235 x 0.35 = 82.3 mm
Overall Diameter = (82.3 x 2) + (18 x 25.4) = 621.7 mm
Circumference = 621.7 x π = 1953.1 mm
Overall Diameter = (82.3 x 2) + (18 x 25.4) = 621.7 mm
Circumference = 621.7 x π = 1953.1 mm
Frequently Asked Questions
The 235/35R18 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 235/35R18 tire has an overall diameter of 621.7mm (24.5 inches). The sidewall height is 82.3mm, and the total circumference is 1953mm.
For 235/35R18 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 235/35R18 621.7mm diameter. Compatible alternatives include 215/50R16, 155/45R19, 165/50R18. Use our Tire Size Calculator to compare any two sizes.