275/45R20 Tire Size Specifications & Compatible Vehicles
Overall Diameter
755.5 mm
Section Width
275 mm
Sidewall Height
123.8 mm
Circumference
2373.5 mm
Revs/Mile
678
Rim Diameter
20"
Inch Equivalent
29.7x10.8R20
Rim Width (ETRTO)
8.5" – 11.0"
Compatible Vehicles
The following vehicles use 275/45R20 tires from the factory:
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 275/45R20 and may be used as replacements:
Popular Comparisons
See how 275/45R20 compares to other common tire sizes:
Understanding 275/45R20
The tire size 275/45R20 means the tire has a section width of 275mm, an aspect ratio of 45% (the sidewall height is 45% of the width), and fits a 20-inch rim.
Sidewall Height = 275 x 0.45 = 123.8 mm
Overall Diameter = (123.8 x 2) + (20 x 25.4) = 755.5 mm
Circumference = 755.5 x π = 2373.5 mm
Overall Diameter = (123.8 x 2) + (20 x 25.4) = 755.5 mm
Circumference = 755.5 x π = 2373.5 mm
Frequently Asked Questions
The 275/45R20 tire size is used on 6 vehicle trims including the 2025 Volvo XC90, 2024 Volvo XC90, 2023 Volvo XC90 and 3 more.
A 275/45R20 tire has an overall diameter of 755.5mm (29.7 inches). The sidewall height is 123.8mm, and the total circumference is 2374mm.
For 275/45R20 tires, the ETRTO recommended rim width is 9.5". The acceptable range is 8.5" minimum to 11.0" 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 275/45R20 755.5mm diameter. Compatible alternatives include 165/75R20, 225/55R20, 195/70R19. Use our Tire Size Calculator to compare any two sizes.