225/70R15 tire size
225/70R15 is a metric size: 27.4" tall, 8.9" wide, on a 15" rim — about a 27.5x9.00R15. The sidewall is 6.2" and the tire turns 736 times per mile.
225/70R15 specs
| Overall diameter (height) | 27.40" · 696 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 6.20" · 158 mm (70% of width) |
| Rim diameter | 15" |
| Circumference | 86.08" · 2.187 m |
| Revolutions per mile | 736 (457 per km) |
| Inch (flotation) equivalent | 27.5x9.00R15 |
Equivalent sizes on a 15" 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 | |
|---|---|---|---|---|---|
| 215/70R15 | 26.85" | -2.01% | -10 mm | 58.8 mph | compare → |
| 205/70R15 | 26.30" | -4.02% | -20 mm | 57.6 mph | compare → |
| 215/75R15 | 27.70" | +1.08% | -10 mm | 60.6 mph | compare → |
| 225/75R15 | 28.29" | +3.23% | 0 mm | 61.9 mph | compare → |
| 205/75R15 | 27.11" | -1.08% | -20 mm | 59.4 mph | compare → |
| 235/70R15 | 27.95" | +2.01% | +10 mm | 61.2 mph | compare → |
| 275/60R15 | 27.99" | +2.16% | +50 mm | 61.3 mph | calculate → |
| 255/60R15 | 27.05" | -1.29% | +30 mm | 59.2 mph | calculate → |
| 235/60R15 | 26.10" | -4.74% | +10 mm | 57.2 mph | calculate → |
| 295/50R15 | 26.61" | -2.87% | +70 mm | 58.3 mph | calculate → |
| 245/60R15 | 26.57" | -3.02% | +20 mm | 58.2 mph | calculate → |
| 325/50R15 | 27.80" | +1.44% | +100 mm | 60.9 mph | calculate → |
| 295/55R15 | 27.78" | +1.36% | +70 mm | 60.8 mph | calculate → |
| 28x10.50R15 | 28.00" | +2.18% | +42 mm | 61.3 mph | calculate → |
| 28x11.50R15 | 28.00" | +2.18% | +67 mm | 61.3 mph | calculate → |
| 28x9.00R15 | 28.00" | +2.18% | +4 mm | 61.3 mph | calculate → |
| 27x9.50R15 | 27.00" | -1.47% | +16 mm | 59.1 mph | calculate → |
| 28x10.00R15 | 28.00" | +2.18% | +29 mm | 61.3 mph | calculate → |
| 28x12.00R15 | 28.00" | +2.18% | +80 mm | 61.3 mph | calculate → |
| 28x6.00R15 | 28.00" | +2.18% | -73 mm | 61.3 mph | calculate → |
| 28x7.50R15 | 28.00" | +2.18% | -34 mm | 61.3 mph | calculate → |
| 235/65R15 | 27.03" | -1.36% | +10 mm | 59.2 mph | calculate → |
| 27x10.50R15 | 27.00" | -1.47% | +42 mm | 59.1 mph | calculate → |
| 185R15 | 26.94" | -1.67% | -40 mm | 59.0 mph | calculate → |
| 28x12.50R15 | 28.00" | +2.18% | +93 mm | 61.3 mph | calculate → |
| 28x13.50R15 | 28.00" | +2.18% | +118 mm | 61.3 mph | calculate → |
| 255/65R15 | 28.05" | +2.37% | +30 mm | 61.4 mph | calculate → |
| 245/70R15 | 28.50" | +4.02% | +20 mm | 62.4 mph | calculate → |
Plus / minus sizing: 14" and 16" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 225/65R16 common | 27.52" | +0.42% | 0 mm | 60.3 mph | compare → |
| 195/75R16 | 27.52" | +0.42% | -30 mm | 60.3 mph | compare → |
| 205/70R16 | 27.30" | -0.37% | -20 mm | 59.8 mph | compare → |
| 205R14 | 27.24" | -0.60% | -20 mm | 59.6 mph | calculate → |
| 295/50R16 | 27.61" | +0.78% | +70 mm | 60.5 mph | calculate → |
| 355/40R16 | 27.18" | -0.80% | +130 mm | 59.5 mph | calculate → |
Try another size against 225/70R15
Questions
What size is 225/70R15 in inches?
225/70R15 is about 27.4" tall and 8.9" wide on a 15-inch rim — roughly a 27.5x9.00R15 in inch sizing.
What does 225/70R15 mean?
225 mm section width, sidewall 70% of the width (6.20"), radial construction, 15-inch rim.
What tire sizes are equivalent to 225/70R15?
On the same 15" rim, within 3% of the diameter: 205/75R15 (-1.08%), 215/75R15 (+1.08%), 255/60R15 (-1.29%), 235/65R15 (-1.36%), 295/55R15 (+1.36%), 325/50R15 (+1.44%).
How many revolutions per mile does a 225/70R15 tire make?
About 736 revolutions per mile (circumference 86.1").
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.