305/45R22 Tire Size

All You Need to Know About 305/45R22 Tires

305/45R22 tires have a section width of 305 millimeters (mm), an aspect ratio of 45%, radial construction, and a 22-inch wheel diameter.

The 305/45R22 tire size has an overall diameter of 32.8 inches and fits within a 10.0’’- 11.5’’ rim width range, making it a common fitment for full-size trucks and large SUVs.

305/45R22 Quick Specs

• Overall diameter: 32.8 in
• Sidewall height: 5.4 in
• Section width: 305 mm
• Rim width range: 10.0-11.5 in
• Wheel diameter: 22 in

A 305/45R22 tire is approximately 32.80 inches (833.30 mm) tall and 12.01 inches (305 mm) wide.

Common Vehicle Fitments for 305/45R22

305/45R22 is a very common aftermarket "plus-size" fitment for:

• Chevrolet Silverado 1500
• GMC Sierra 1500
• Ford F-150
• Ram 1500
• Chevrolet Tahoe
• GMC Yukon
• Cadillac Escalade

What Are the Dimensions of a 305/45R22 Tire in Inches?

A 305/45R22 tire has a section width of 12.01 inches (≈ 12.0") and a sidewall height of 5.40 inches (≈ 5.4"). The overall diameter of a 305/45R22 tire is 32.80 inches (≈ 32.8"), and the circumference is approximately 103.13 inches (≈ 103.1"). The recommended rim width range for the 305/45R22 size is 10.0 to 11.5 inches.

In inches, the 305/45R22 tire size can be represented as 32.8" × 12.0" R22.

Comparison of 305/45R22 With Similar Tire Sizes

Comparing 305/45R22 with 285/45R22 and 275/60R20 highlights how changes in width, aspect ratio, and wheel diameter affect fitment, ride quality, and interchangeability.

What Is the Difference Between 305/45R22 vs 285/45R22?

The main difference between 305/45R22 and 285/45R22 is the section width. The 305/45R22 is 305 mm wide, while the 285/45R22 is 285 mm wide. Both sizes share the same aspect ratio and rim diameter, but the wider tire also has a slightly taller sidewall.

The 305/45R22 has a sidewall height of 137.25 mm (≈ 5.40") and an overall diameter of 833.30 mm (≈ 32.80"). The 285/45R22 has a sidewall height of 128.25 mm (≈ 5.05") and an overall diameter of 815.30 mm (≈ 32.10"). This means the 305/45R22 is 20 mm wider, has a 9.00 mm (≈ 0.35") taller sidewall, and is 18.00 mm (≈ 0.71") larger overall.

305/45R22 vs 285/45R22 Tire Size Comparison Table

Can I use 285/45R22 instead of 305/45R22?

Yes, in most cases. The overall diameter difference is about 2.21%, which is within the commonly accepted industry tolerance. The narrower tread may slightly reduce road contact and steering weight, but ride height, speedometer accuracy, and vehicle systems remain very close to stock. As long as the wheel width is appropriate and there is no clearance issue, this swap is generally safe and practical.

Recommended 285/45R22 Tires 

If you plan to make the switch between 285/45R22 instead of 305/45R22, well-regarded options in this size include:

What Is the Difference Between 305/45R22 vs 275/60R20?

The main differences between 305/45R22 and 275/60R20 are rim diameter, sidewall height, and overall construction. The 305/45R22 fits a 22-inch rim, while the 275/60R20 fits a 20-inch rim, making the two sizes physically incompatible on the same wheels.

The 305/45R22 has a sidewall height of 137.25 mm (≈ 5.40") and an overall diameter of 833.30 mm (≈ 32.80"). The 275/60R20 has a sidewall height of 165.00 mm (≈ 6.50") and an overall diameter of 838.00 mm (≈ 32.99"). This means the 275/60R20 is 30 mm narrower, has a 27.75 mm (≈ 1.09") taller sidewall, and is 4.70 mm (≈ 0.19") taller overall.

Can I use 275/60R20 instead of 305/45R22?

No, not as a direct replacement. A 275/60R20 tire cannot be mounted on a 22-inch rim. Switching to this size requires purchasing 20-inch wheels, which is a mandatory change. Once the correct wheels are installed, the overall diameter difference is only ≈ 0.56%, so speedometer accuracy remains very close. The much taller sidewall will noticeably improve ride comfort and impact absorption, but steering response will be less sharp compared to a 22-inch setup.