185/65R15 Tire Size Specifications & Compatible Vehicles
Overall Diameter
621.5 mm
Section Width
185 mm
Sidewall Height
120.3 mm
Circumference
1952.5 mm
Revs/Mile
824
Rim Diameter
15"
Inch Equivalent
24.5x7.3R15
Rim Width (ETRTO)
5.0" – 7.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 185/65R15 and may be used as replacements:
Popular Comparisons
See how 185/65R15 compares to other common tire sizes:
Understanding 185/65R15
The tire size 185/65R15 means the tire has a section width of 185mm, an aspect ratio of 65% (the sidewall height is 65% of the width), and fits a 15-inch rim.
Sidewall Height = 185 x 0.65 = 120.3 mm
Overall Diameter = (120.3 x 2) + (15 x 25.4) = 621.5 mm
Circumference = 621.5 x π = 1952.5 mm
Overall Diameter = (120.3 x 2) + (15 x 25.4) = 621.5 mm
Circumference = 621.5 x π = 1952.5 mm
Frequently Asked Questions
The 185/65R15 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 185/65R15 tire has an overall diameter of 621.5mm (24.5 inches). The sidewall height is 120.3mm, and the total circumference is 1953mm.
For 185/65R15 tires, the ETRTO recommended rim width is 6.0". The acceptable range is 5.0" minimum to 7.0" 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 185/65R15 621.5mm diameter. Compatible alternatives include 215/50R16, 295/45R14, 205/65R14. Use our Tire Size Calculator to compare any two sizes.