245/40R17 Tire Size Specifications & Compatible Vehicles
Overall Diameter
627.8 mm
Section Width
245 mm
Sidewall Height
98.0 mm
Circumference
1972.3 mm
Revs/Mile
816
Rim Diameter
17"
Inch Equivalent
24.7x9.6R17
Rim Width (ETRTO)
7.0" – 9.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 245/40R17 and may be used as replacements:
Understanding 245/40R17
The tire size 245/40R17 means the tire has a section width of 245mm, an aspect ratio of 40% (the sidewall height is 40% of the width), and fits a 17-inch rim.
Sidewall Height = 245 x 0.4 = 98.0 mm
Overall Diameter = (98.0 x 2) + (17 x 25.4) = 627.8 mm
Circumference = 627.8 x π = 1972.3 mm
Overall Diameter = (98.0 x 2) + (17 x 25.4) = 627.8 mm
Circumference = 627.8 x π = 1972.3 mm
Frequently Asked Questions
The 245/40R17 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 245/40R17 tire has an overall diameter of 627.8mm (24.7 inches). The sidewall height is 98.0mm, and the total circumference is 1972mm.
For 245/40R17 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 245/40R17 627.8mm diameter. Compatible alternatives include 155/55R18, 285/30R18, 185/60R16. Use our Tire Size Calculator to compare any two sizes.