315/45R22 tire size
315/45R22 is a metric size: 33.2" tall, 12.4" wide, on a 22" rim — about a 33x12.50R22. The sidewall is 5.6" and the tire turns 608 times per mile.
315/45R22 specs
| Overall diameter (height) | 33.16" · 842 mm |
|---|---|
| Section width | 12.40" · 315 mm |
| Sidewall height | 5.58" · 142 mm (45% of width) |
| Rim diameter | 22" |
| Circumference | 104.18" · 2.646 m |
| Revolutions per mile | 608 (378 per km) |
| Inch (flotation) equivalent | 33x12.50R22 |
Equivalent sizes on a 22" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 285/45R22 common | 32.10" | -3.21% | -30 mm | 58.1 mph | calculate → |
| 275/50R22 common | 32.83" | -1.01% | -40 mm | 59.4 mph | calculate → |
| 305/45R22 | 32.81" | -1.07% | -10 mm | 59.4 mph | calculate → |
| 33x12.50R22 | 33.00" | -0.49% | +3 mm | 59.7 mph | calculate → |
| 275/45R22 | 31.74" | -4.27% | -40 mm | 57.4 mph | calculate → |
| 325/50R22 | 34.80" | +4.93% | +10 mm | 63.0 mph | calculate → |
| 305/40R22 | 31.61" | -4.69% | -10 mm | 57.2 mph | calculate → |
| 285/55R22 | 34.34" | +3.56% | -30 mm | 62.1 mph | calculate → |
| 285/50R22 | 33.22" | +0.18% | -30 mm | 60.1 mph | calculate → |
| 295/55R22 | 34.78" | +4.87% | -20 mm | 62.9 mph | calculate → |
| 295/50R22 | 33.61" | +1.37% | -20 mm | 60.8 mph | calculate → |
| 325/40R22 | 32.24" | -2.79% | +10 mm | 58.3 mph | calculate → |
| 265/50R22 | 32.43" | -2.20% | -50 mm | 58.7 mph | calculate → |
| 355/40R22 | 33.18" | +0.06% | +40 mm | 60.0 mph | calculate → |
| 265/60R22 | 34.52" | +4.10% | -50 mm | 62.5 mph | calculate → |
| 305/50R22 | 34.01" | +2.55% | -10 mm | 61.5 mph | calculate → |
| 33x13.50R22 | 33.00" | -0.49% | +28 mm | 59.7 mph | calculate → |
| 33x14.50R22 | 33.00" | -0.49% | +53 mm | 59.7 mph | calculate → |
Plus / minus sizing: 21" and 23" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/55R21 | 32.91" | -0.76% | -40 mm | 59.5 mph | calculate → |
Try another size against 315/45R22
Questions
What size is 315/45R22 in inches?
315/45R22 is about 33.2" tall and 12.4" wide on a 22-inch rim — roughly a 33x12.50R22 in inch sizing.
What does 315/45R22 mean?
315 mm section width, sidewall 45% of the width (5.58"), radial construction, 22-inch rim.
What tire sizes are equivalent to 315/45R22?
On the same 22" rim, within 3% of the diameter: 355/40R22 (+0.06%), 285/50R22 (+0.18%), 33x12.50R22 (-0.49%), 33x13.50R22 (-0.49%), 33x14.50R22 (-0.49%), 275/50R22 (-1.01%).
How many revolutions per mile does a 315/45R22 tire make?
About 608 revolutions per mile (circumference 104.2").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.