275/30R20 Tire Size Specifications & Compatible Vehicles
Overall Diameter
673.0 mm
Section Width
275 mm
Sidewall Height
82.5 mm
Circumference
2114.3 mm
Revs/Mile
761
Rim Diameter
20"
Inch Equivalent
26.5x10.8R20
Rim Width (ETRTO)
8.5" – 11.0"
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 275/30R20 and may be used as replacements:
Popular Comparisons
See how 275/30R20 compares to other common tire sizes:
Understanding 275/30R20
The tire size 275/30R20 means the tire has a section width of 275mm, an aspect ratio of 30% (the sidewall height is 30% of the width), and fits a 20-inch rim.
Sidewall Height = 275 x 0.3 = 82.5 mm
Overall Diameter = (82.5 x 2) + (20 x 25.4) = 673.0 mm
Circumference = 673.0 x π = 2114.3 mm
Overall Diameter = (82.5 x 2) + (20 x 25.4) = 673.0 mm
Circumference = 673.0 x π = 2114.3 mm
Frequently Asked Questions
The 275/30R20 is a standard tire size. Check your vehicle door jamb sticker or owner manual to confirm compatibility.
A 275/30R20 tire has an overall diameter of 673.0mm (26.5 inches). The sidewall height is 82.5mm, and the total circumference is 2114mm.
For 275/30R20 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 275/30R20 673.0mm diameter. Compatible alternatives include 165/50R20, 155/45R21, 175/40R21. Use our Tire Size Calculator to compare any two sizes.