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305/45R22 tire size in inches
305/45R22 is 32.81" tall and 12.01" wide, and fits a 22" rim. In flotation (inch) sizing that is roughly 32.8x12.0R22.
305/45R22 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 32.81" | 833 mm |
| Section width | 12.01" | 305 mm |
| Sidewall height | 5.40" | 137.2 mm |
| Rim diameter | 22" | 558.8 mm |
| Circumference | 103.1" | 2618 mm |
| Revolutions per mile | 615 | |
| Aspect ratio | 45% (sidewall is 45% of the width) | |
Drawn to scale
Among the 65 sizes for 22" wheels on this site, 305/45R22 is #32 by height (shortest: 235/30R22, tallest: 285/75R22).
What people compare 305/45R22 with
Real comparisons drivers search for, worked out against 305/45R22:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 285/45R22 | -0.71" (-2.16%) | -0.79" | -0.35" | 61.3 mph |
| 305/40R22 | -1.20" (-3.66%) | 0.00" | -0.60" | 62.3 mph |
| 275/50R22 | +0.02" (+0.06%) | -1.18" | +0.01" | 60 mph |
How the 305/45R22 numbers are worked out
The size code reads as 305 mm section width, 45% aspect ratio, R for radial construction and 22-inch wheel.
- Sidewall = 305 × 45% = 137.2 mm = 5.40"
- Diameter = 22" + 2 × 5.40" = 32.81"
- Circumference = π × 32.81" = 103.1"
- Revs per mile = 63,360" ÷ 103.1" = 615
Sizes that can replace 305/45R22 on a 22" wheel
Within 3% of 32.81". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 275/50R22 | 32.83" | 10.83" | +0.06% | 60 mph |
| 315/45R22 | 33.16" | 12.40" | +1.07% | 59.4 mph |
| 295/45R22 | 32.45" | 11.61" | -1.1% | 60.7 mph |
| 355/40R22 | 33.18" | 13.98" | +1.13% | 59.3 mph |
| 265/50R22 | 32.43" | 10.43" | -1.16% | 60.7 mph |
| 285/50R22 | 33.22" | 11.22" | +1.25% | 59.3 mph |
| 325/40R22 | 32.24" | 12.80" | -1.74% | 61.1 mph |
| 265/55R22 | 33.48" | 10.43" | +2.04% | 58.8 mph |
| 285/45R22 | 32.10" | 11.22" | -2.16% | 61.3 mph |
| 325/45R22 | 33.52" | 12.80" | +2.16% | 58.7 mph |
| 295/50R22 | 33.61" | 11.61" | +2.44% | 58.6 mph |
| 315/40R22 | 31.92" | 12.40" | -2.71% | 61.7 mph |
One size wider or narrower
- Narrower: 295/45R22 — 11.61" wide, 32.45" tall
- Wider: 315/45R22 — 12.40" wide, 33.16" tall
Same height on a different wheel size
- 265/85R15 15" (-0.21%)
- 305/75R15 15" (+0.61%)
- 295/75R15 15" (-1.19%)
- 315/70R15 15" (-1.37%)
- 305/70R16 16" (0%)
- 285/75R16 16" (+0.06%)
- 265/80R16 16" (-0.37%)
- 255/85R16 16" (+0.79%)
- 280/75R16 16" (-0.82%)
- 245/85R16 16" (-1.25%)
Questions about 305/45R22
How tall is a 305/45R22 tire in inches?
A 305/45R22 tire is 32.81 inches (833 mm) tall: the 22-inch rim plus two sidewalls of 5.40 inches each.
Is 305/45R22 a 33 inch tire?
Yes. At 32.81 inches tall it is commonly called a 33-inch tire.
How many revolutions per mile does a 305/45R22 make?
About 615 revolutions per mile, based on a calculated circumference of 103.1 inches.
What size can replace 305/45R22?
275/50R22 is the closest match on a 22" rim (+0.06% height). Check load index, speed rating and clearance first.
Compare 305/45R22 against any other size with the tire size calculator.