305/45R22 Tire Size Specifications & Compatible Vehicles
Overall Diameter
833.3 mm
Section Width
305 mm
Sidewall Height
137.3 mm
Circumference
2617.9 mm
Revs/Mile
615
Rim Diameter
22"
Inch Equivalent
32.8x12R22
Rim Width (ETRTO)
9.5" – 12.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 305/45R22 and may be used as replacements:
Popular Comparisons
See how 305/45R22 compares to other common tire sizes:
Understanding 305/45R22
The tire size 305/45R22 means the tire has a section width of 305mm, an aspect ratio of 45% (the sidewall height is 45% of the width), and fits a 22-inch rim.
Sidewall Height = 305 x 0.45 = 137.3 mm
Overall Diameter = (137.3 x 2) + (22 x 25.4) = 833.3 mm
Circumference = 833.3 x π = 2617.9 mm
Overall Diameter = (137.3 x 2) + (22 x 25.4) = 833.3 mm
Circumference = 833.3 x π = 2617.9 mm
Frequently Asked Questions
The 305/45R22 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 305/45R22 tire has an overall diameter of 833.3mm (32.8 inches). The sidewall height is 137.3mm, and the total circumference is 2618mm.
For 305/45R22 tires, the ETRTO recommended rim width is 10.5". The acceptable range is 9.5" minimum to 12.0" 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 305/45R22 833.3mm diameter. Compatible alternatives include 325/50R20, 275/50R22, 295/55R20. Use our Tire Size Calculator to compare any two sizes.