255/55R20 Tire Size Specifications & Compatible Vehicles
Overall Diameter
788.5 mm
Section Width
255 mm
Sidewall Height
140.3 mm
Circumference
2477.1 mm
Revs/Mile
650
Rim Diameter
20"
Inch Equivalent
31x10R20
Rim Width (ETRTO)
7.5" – 10.0"
Compatible Vehicles
The following vehicles use 255/55R20 tires from the factory:
2025 Buick Enclave Essence 2025 Buick Enclave Avenir 2024 Buick Enclave Essence 2024 Buick Enclave Avenir 2023 Buick Enclave Avenir 2022 Buick Enclave Avenir 2021 Buick Enclave Avenir 2020 Buick Enclave Avenir 2025 Chevrolet Traverse LS/LT 2024 Chevrolet Traverse RS/Premier/High Country 2023 Chevrolet Traverse RS/Premier/High Country 2022 Chevrolet Traverse RS/Premier/High Country 2021 Chevrolet Traverse RS/Premier/High Country 2020 Chevrolet Traverse RS/Premier/High Country 2025 Ford Explorer XLT/Limited 2024 Ford Explorer Limited/ST 2023 Ford Explorer Limited/ST 2022 Ford Explorer Limited/ST 2021 Ford Explorer Limited/ST/Platinum 2020 Ford Explorer Limited/ST/Platinum 2025 Lincoln Aviator Standard 2024 Lincoln Aviator Standard 2023 Lincoln Aviator Standard 2022 Lincoln Aviator Standard 2021 Lincoln Aviator Standard 2020 Lincoln Aviator Standard
Alternative Tire Sizes
These tire sizes are within 3% overall diameter of 255/55R20 and may be used as replacements:
Understanding 255/55R20
The tire size 255/55R20 means the tire has a section width of 255mm, an aspect ratio of 55% (the sidewall height is 55% of the width), and fits a 20-inch rim.
Sidewall Height = 255 x 0.55 = 140.3 mm
Overall Diameter = (140.3 x 2) + (20 x 25.4) = 788.5 mm
Circumference = 788.5 x π = 2477.1 mm
Overall Diameter = (140.3 x 2) + (20 x 25.4) = 788.5 mm
Circumference = 788.5 x π = 2477.1 mm
Frequently Asked Questions
The 255/55R20 tire size is used on 26 vehicle trims including the 2025 Buick Enclave, 2025 Buick Enclave, 2024 Buick Enclave and 23 more.
A 255/55R20 tire has an overall diameter of 788.5mm (31.0 inches). The sidewall height is 140.3mm, and the total circumference is 2477mm.
For 255/55R20 tires, the ETRTO recommended rim width is 8.5". The acceptable range is 7.5" minimum to 10.0" 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 255/55R20 788.5mm diameter. Compatible alternatives include 165/85R20, 255/60R19, 255/50R21. Use our Tire Size Calculator to compare any two sizes.