245/35R18 Tire Size Specifications & Compatible Vehicles
Overall Diameter
628.7 mm
Section Width
245 mm
Sidewall Height
85.8 mm
Circumference
1975.1 mm
Revs/Mile
815
Rim Diameter
18"
Inch Equivalent
24.8x9.6R18
Rim Width (ETRTO)
7.0" – 9.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 245/35R18 and may be used as replacements:
Understanding 245/35R18
The tire size 245/35R18 means the tire has a section width of 245mm, an aspect ratio of 35% (the sidewall height is 35% of the width), and fits a 18-inch rim.
Sidewall Height = 245 x 0.35 = 85.8 mm
Overall Diameter = (85.8 x 2) + (18 x 25.4) = 628.7 mm
Circumference = 628.7 x π = 1975.1 mm
Overall Diameter = (85.8 x 2) + (18 x 25.4) = 628.7 mm
Circumference = 628.7 x π = 1975.1 mm
Frequently Asked Questions
The 245/35R18 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 245/35R18 tire has an overall diameter of 628.7mm (24.8 inches). The sidewall height is 85.8mm, and the total circumference is 1975mm.
For 245/35R18 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 245/35R18 628.7mm diameter. Compatible alternatives include 185/60R16, 215/40R18, 285/30R18. Use our Tire Size Calculator to compare any two sizes.