255/50R20 Tire Size Specifications & Compatible Vehicles

Overall Diameter

763.0 mm

Section Width

255 mm

Sidewall Height

127.5 mm

Circumference

2397.0 mm

Revs/Mile

671

Rim Diameter

20"

Inch Equivalent

30x10R20

Rim Width (ETRTO)

7.5" – 10.0"

Compatible Vehicles

The following vehicles use 255/50R20 tires from the factory:

2025 Acura MDX Technology 2025 Acura MDX A-Spec 2024 Acura MDX Technology 2023 Acura MDX Technology 2022 Acura MDX Technology 2021 Acura MDX Technology 2020 Acura MDX Technology 2025 Audi Q7 Premium Plus 55 TFSI quattro 2024 Audi Q7 Premium Plus 55 TFSI quattro 2021 Audi Q7 Premium Plus 55 TFSI quattro 2020 Audi Q7 Premium Plus 55 TFSI quattro 2025 Honda Pilot EX-L/Touring/Elite 2024 Honda Pilot EX-L/Touring/Elite 2023 Honda Pilot Touring/Elite/TrailSport 2022 Honda Pilot Touring/Elite/TrailSport 2025 Infiniti QX60 Luxe 2025 Infiniti QX60 Autograph 2024 Infiniti QX60 Luxe 2024 Infiniti QX60 Autograph 2023 Infiniti QX60 Luxe 2022 Infiniti QX60 Luxe 2025 Kia Telluride SX/SX Prestige/X-Line/X-Pro 2024 Kia Telluride SX/SX Prestige/X-Line/X-Pro 2023 Kia Telluride SX/SX Prestige/X-Line/X-Pro 2022 Kia Telluride SX/SX Prestige 2021 Kia Telluride SX/SX Prestige 2020 Kia Telluride SX/SX Prestige

Alternative Tire Sizes

These tire sizes are within 3% overall diameter of 255/50R20 and may be used as replacements:

165/85R19 Safe 0.0% diff 255/55R19 Safe 0.0% diff 255/45R21 Safe 0.0% diff 255/60R18 Safe 0.0% diff 255/40R22 Safe 0.0% diff 235/65R18 Safe 0.0% diff 175/80R19 Safe 0.1% diff 185/55R22 Safe 0.1% diff 305/50R18 Safe 0.1% diff 205/50R22 Safe 0.1% diff 215/65R19 Safe 0.1% diff 165/70R21 Safe 0.2% diff

Popular Comparisons

See how 255/50R20 compares to other common tire sizes:

255/50R20 vs 275/50R20 Full-size SUV width comparison 235/55R20 vs 255/50R20 EV SUV width upgrade

Understanding 255/50R20

The tire size 255/50R20 means the tire has a section width of 255mm, an aspect ratio of 50% (the sidewall height is 50% of the width), and fits a 20-inch rim.

Sidewall Height = 255 x 0.5 = 127.5 mm
Overall Diameter = (127.5 x 2) + (20 x 25.4) = 763.0 mm
Circumference = 763.0 x π = 2397.0 mm

Frequently Asked Questions

What vehicles use 255/50R20 tires? ▼

The 255/50R20 tire size is used on 27 vehicle trims including the 2025 Acura MDX, 2025 Acura MDX, 2024 Acura MDX and 24 more.

What is the diameter of a 255/50R20 tire? ▼

A 255/50R20 tire has an overall diameter of 763.0mm (30.0 inches). The sidewall height is 127.5mm, and the total circumference is 2397mm.

What rim width do I need for 255/50R20 tires? ▼

For 255/50R20 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.

Can I replace 255/50R20 with a different size? ▼

Yes, as long as the replacement tire overall diameter is within 3% of the 255/50R20 763.0mm diameter. Compatible alternatives include 165/85R19, 255/55R19, 255/45R21. Use our Tire Size Calculator to compare any two sizes.