295/45R21 Tire Size Specifications & Compatible Vehicles
Overall Diameter
798.9 mm
Section Width
295 mm
Sidewall Height
132.8 mm
Circumference
2509.8 mm
Revs/Mile
641
Rim Diameter
21"
Inch Equivalent
31.5x11.6R21
Rim Width (ETRTO)
9.0" – 11.5"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 295/45R21 and may be used as replacements:
Understanding 295/45R21
The tire size 295/45R21 means the tire has a section width of 295mm, an aspect ratio of 45% (the sidewall height is 45% of the width), and fits a 21-inch rim.
Sidewall Height = 295 x 0.45 = 132.8 mm
Overall Diameter = (132.8 x 2) + (21 x 25.4) = 798.9 mm
Circumference = 798.9 x π = 2509.8 mm
Overall Diameter = (132.8 x 2) + (21 x 25.4) = 798.9 mm
Circumference = 798.9 x π = 2509.8 mm
Frequently Asked Questions
The 295/45R21 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 295/45R21 tire has an overall diameter of 798.9mm (31.5 inches). The sidewall height is 132.8mm, and the total circumference is 2510mm.
For 295/45R21 tires, the ETRTO recommended rim width is 10.0". The acceptable range is 9.0" minimum to 11.5" 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 295/45R21 798.9mm diameter. Compatible alternatives include 185/65R22, 265/50R21, 265/55R20. Use our Tire Size Calculator to compare any two sizes.