225/75R15 tire size
225/75R15 is a metric size: 28.3" tall, 8.9" wide, on a 15" rim — about a 28.5x9.00R15. The sidewall is 6.6" and the tire turns 713 times per mile.
225/75R15 specs
| Overall diameter (height) | 28.29" · 718 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 6.64" · 169 mm (75% of width) |
| Rim diameter | 15" |
| Circumference | 88.87" · 2.257 m |
| Revolutions per mile | 713 (443 per km) |
| Inch (flotation) equivalent | 28.5x9.00R15 |
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 | |
|---|---|---|---|---|---|
| 235/75R15 common | 28.88" | +2.09% | +10 mm | 61.3 mph | compare → |
| 215/75R15 | 27.70" | -2.09% | -10 mm | 58.7 mph | compare → |
| 225/70R15 | 27.40" | -3.13% | 0 mm | 58.1 mph | compare → |
| 235/70R15 | 27.95" | -1.18% | +10 mm | 59.3 mph | compare → |
| 205/75R15 | 27.11" | -4.18% | -20 mm | 57.5 mph | compare → |
| 255/70R15 | 29.06" | +2.71% | +30 mm | 61.6 mph | calculate → |
| 265/70R15 | 29.61" | +4.66% | +40 mm | 62.8 mph | calculate → |
| 275/60R15 | 27.99" | -1.04% | +50 mm | 59.4 mph | calculate → |
| 255/60R15 | 27.05" | -4.38% | +30 mm | 57.4 mph | calculate → |
| 325/50R15 | 27.80" | -1.74% | +100 mm | 59.0 mph | calculate → |
| 29x10.50R15 | 29.00" | +2.52% | +42 mm | 61.5 mph | calculate → |
| 28x10.50R15 | 28.00" | -1.02% | +42 mm | 59.4 mph | calculate → |
| 28x11.50R15 | 28.00" | -1.02% | +67 mm | 59.4 mph | calculate → |
| 28x9.00R15 | 28.00" | -1.02% | +4 mm | 59.4 mph | calculate → |
| 295/55R15 | 27.78" | -1.81% | +70 mm | 58.9 mph | calculate → |
| 28x10.00R15 | 28.00" | -1.02% | +29 mm | 59.4 mph | calculate → |
| 28x12.00R15 | 28.00" | -1.02% | +80 mm | 59.4 mph | calculate → |
| 28x6.00R15 | 28.00" | -1.02% | -73 mm | 59.4 mph | calculate → |
| 28x7.50R15 | 28.00" | -1.02% | -34 mm | 59.4 mph | calculate → |
| 29x11.50R15 | 29.00" | +2.52% | +67 mm | 61.5 mph | calculate → |
| 29x15.00R15 | 29.00" | +2.52% | +156 mm | 61.5 mph | calculate → |
| 29x18.00R15 | 29.00" | +2.52% | +232 mm | 61.5 mph | calculate → |
| 29x8.50R15 | 29.00" | +2.52% | -9 mm | 61.5 mph | calculate → |
| 215/85R15 | 29.39" | +3.90% | -10 mm | 62.3 mph | calculate → |
| 29.5x10.50R15 | 29.50" | +4.29% | +42 mm | 62.6 mph | calculate → |
| 29.5x11.50R15 | 29.50" | +4.29% | +67 mm | 62.6 mph | calculate → |
| 29.5x13.50R15 | 29.50" | +4.29% | +118 mm | 62.6 mph | calculate → |
| 29.5x9.00R15 | 29.50" | +4.29% | +4 mm | 62.6 mph | calculate → |
| 27x9.50R15 | 27.00" | -4.55% | +16 mm | 57.3 mph | calculate → |
| 245/70R15 | 28.50" | +0.77% | +20 mm | 60.5 mph | calculate → |
| 255/65R15 | 28.05" | -0.84% | +30 mm | 59.5 mph | calculate → |
| 28x12.50R15 | 28.00" | -1.02% | +93 mm | 59.4 mph | calculate → |
| 28x13.50R15 | 28.00" | -1.02% | +118 mm | 59.4 mph | calculate → |
| 29x12.50R15 | 29.00" | +2.52% | +93 mm | 61.5 mph | calculate → |
| 29x15.50R15 | 29.00" | +2.52% | +169 mm | 61.5 mph | calculate → |
| 29x18.50R15 | 29.00" | +2.52% | +245 mm | 61.5 mph | calculate → |
| 235/65R15 | 27.03" | -4.45% | +10 mm | 57.3 mph | calculate → |
| 27x10.50R15 | 27.00" | -4.55% | +42 mm | 57.3 mph | calculate → |
| 185R15 | 26.94" | -4.75% | -40 mm | 57.2 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 | |
|---|---|---|---|---|---|
| 235/65R16 common | 28.03" | -0.92% | +10 mm | 59.4 mph | compare → |
| 225/70R16 common | 28.40" | +0.40% | 0 mm | 60.2 mph | compare → |
| 205/75R16 | 28.11" | -0.64% | -20 mm | 59.6 mph | calculate → |
| 195/80R16 | 28.28" | -0.01% | -30 mm | 60.0 mph | calculate → |
| 285/55R16 | 28.34" | +0.19% | +60 mm | 60.1 mph | calculate → |
| 255/60R16 | 28.05" | -0.85% | +30 mm | 59.5 mph | calculate → |
Try another size against 225/75R15
Questions
What size is 225/75R15 in inches?
225/75R15 is about 28.3" tall and 8.9" wide on a 15-inch rim — roughly a 28.5x9.00R15 in inch sizing.
What does 225/75R15 mean?
225 mm section width, sidewall 75% of the width (6.64"), radial construction, 15-inch rim.
What tire sizes are equivalent to 225/75R15?
On the same 15" rim, within 3% of the diameter: 245/70R15 (+0.77%), 255/65R15 (-0.84%), 28x10.50R15 (-1.02%), 28x10.00R15 (-1.02%), 28x11.50R15 (-1.02%), 28x12.50R15 (-1.02%).
How many revolutions per mile does a 225/75R15 tire make?
About 713 revolutions per mile (circumference 88.9").
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.