275/60R18 Tire Size Specifications & Compatible Vehicles

Overall Diameter

787.2 mm

Section Width

275 mm

Sidewall Height

165.0 mm

Circumference

2473.1 mm

Revs/Mile

651

Rim Diameter

18"

Alternative Tire Sizes

These tire sizes are within 3% overall diameter of 275/60R18 and may be used as replacements:

255/55R20 Safe 0.2% · -20mm · +2" rim 255/65R18 Safe 0.2% · -20mm · same rim 255/70R17 Safe 0.2% · -20mm · -1" rim 275/55R19 Safe 0.3% · same width · +1" rim 275/50R20 Safe 0.5% · same width · +2" rim 285/50R20 Safe 0.7% · +10mm · +2" rim 285/55R19 Safe 1.1% · +10mm · +1" rim 265/65R17 Safe 1.4% · -10mm · -1" rim 265/60R18 Caution 1.5% · -10mm · same rim 265/55R20 Caution 1.6% · -10mm · +2" rim 265/55R19 Caution 1.7% · -10mm · +1" rim 295/45R20 Caution 1.7% · +20mm · +2" rim

Understanding 275/60R18

The tire size 275/60R18 means the tire has a section width of 275mm, an aspect ratio of 60% (the sidewall height is 60% of the width), and fits a 18-inch rim.

Sidewall Height = 275 x 0.6 = 165.0 mm
Overall Diameter = (165.0 x 2) + (18 x 25.4) = 787.2 mm
Circumference = 787.2 x π = 2473.1 mm

With an aspect ratio of 60%, this is a standard-profile tire that balances ride comfort with handling precision. This profile range is the most common for passenger cars, crossovers, and light SUVs.

Choosing Replacement Tires

When replacing 275/60R18 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.