265/30R20 Tire Size Specifications & Compatible Vehicles

Overall Diameter

667.0 mm

Section Width

265 mm

Sidewall Height

79.5 mm

Circumference

2095.4 mm

Revs/Mile

768

Rim Diameter

20"

Alternative Tire Sizes

These tire sizes are within 3% overall diameter of 265/30R20 and may be used as replacements:

265/35R19 Safe 0.2% · same width · -1" rim 265/40R18 Safe 0.3% · same width · -2" rim 255/40R18 Safe 0.9% · -10mm · -2" rim 255/35R19 Safe 0.9% · -10mm · -1" rim 255/30R20 Safe 0.9% · -10mm · same rim 275/30R20 Safe 0.9% · +10mm · same rim 275/35R19 Safe 1.2% · +10mm · -1" rim 275/40R18 Caution 1.5% · +10mm · -2" rim 245/45R18 Caution 1.6% · -20mm · -2" rim 245/40R19 Caution 1.7% · -20mm · -1" rim 285/30R20 Caution 1.8% · +20mm · same rim 245/35R19 Caution 1.9% · -20mm · -1" rim

Understanding 265/30R20

The tire size 265/30R20 means the tire has a section width of 265mm, an aspect ratio of 30% (the sidewall height is 30% of the width), and fits a 20-inch rim.

Sidewall Height = 265 x 0.3 = 79.5 mm
Overall Diameter = (79.5 x 2) + (20 x 25.4) = 667.0 mm
Circumference = 667.0 x π = 2095.4 mm

With an aspect ratio of 30%, this is a low-profile tire. Low-profile tires offer sharper steering response and better cornering stability, but provide a firmer ride and are more susceptible to pothole damage. They are commonly found on sport sedans and performance vehicles.

Choosing Replacement Tires

When replacing 265/30R20 tires, verify the size matches your vehicle's tire placard (typically found on the driver's door jamb or in the owner's manual). The NHTSA Tire Ratings Search tool lets you look up manufacturer load and speed ratings for specific tires.

Key factors beyond size: load index (must meet or exceed the vehicle's requirement), speed rating (must match or exceed the original specification), and seasonal type (all-season, summer, or winter) based on your driving conditions. The U.S. Tire Manufacturers Association recommends replacing all four tires at once, or at minimum in pairs on the same axle.