305/30R22 Tire Size Specifications & Compatible Vehicles

Overall Diameter

741.8 mm

Section Width

305 mm

Sidewall Height

91.5 mm

Circumference

2330.4 mm

Revs/Mile

691

Rim Diameter

22"

Alternative Tire Sizes

These tire sizes are within 3% overall diameter of 305/30R22 and may be used as replacements:

295/35R21 Safe 0.3% · -10mm · -1" rim 295/40R20 Safe 0.3% · -10mm · -2" rim 305/35R21 Safe 0.7% · same width · -1" rim 285/40R20 Safe 0.8% · -20mm · -2" rim 295/30R22 Safe 0.8% · -10mm · same rim 315/30R22 Safe 0.8% · +10mm · same rim 285/35R21 Safe 1.2% · -20mm · -1" rim 305/40R20 Safe 1.4% · same width · -2" rim 285/30R22 Caution 1.6% · -20mm · same rim 325/30R22 Caution 1.6% · +20mm · same rim 315/35R21 Caution 1.6% · +10mm · -1" rim 285/35R22 Caution 2.2% · -20mm · same rim

Understanding 305/30R22

The tire size 305/30R22 means the tire has a section width of 305mm, an aspect ratio of 30% (the sidewall height is 30% of the width), and fits a 22-inch rim.

Sidewall Height = 305 x 0.3 = 91.5 mm
Overall Diameter = (91.5 x 2) + (22 x 25.4) = 741.8 mm
Circumference = 741.8 x π = 2330.4 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 305/30R22 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.