225/90R16 tire size
225/90R16 is a metric size: 31.9" tall, 8.9" wide, on a 16" rim — about a 32x9.00R16. The sidewall is 8.0" and the tire turns 631 times per mile.
225/90R16 specs
| Overall diameter (height) | 31.94" · 811 mm |
|---|---|
| Section width | 8.86" · 225 mm |
| Sidewall height | 7.97" · 203 mm (90% of width) |
| Rim diameter | 16" |
| Circumference | 100.36" · 2.549 m |
| Revolutions per mile | 631 (392 per km) |
| Inch (flotation) equivalent | 32x9.00R16 |
Equivalent sizes on a 16" 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 | |
|---|---|---|---|---|---|
| 265/75R16 common | 31.65" | -0.92% | +40 mm | 59.4 mph | calculate → |
| 245/75R16 common | 30.47" | -4.62% | +20 mm | 57.2 mph | calculate → |
| 265/70R16 common | 30.61" | -4.19% | +40 mm | 57.5 mph | calculate → |
| 235/85R16 common | 31.73" | -0.68% | +10 mm | 59.6 mph | calculate → |
| 285/75R16 common | 32.83" | +2.77% | +60 mm | 61.7 mph | calculate → |
| 215/85R16 common | 30.39" | -4.87% | -10 mm | 57.1 mph | calculate → |
| 305/70R16 | 32.81" | +2.71% | +80 mm | 61.6 mph | calculate → |
| 275/70R16 | 31.16" | -2.46% | +50 mm | 58.5 mph | calculate → |
| 255/85R16 | 33.07" | +3.51% | +30 mm | 62.1 mph | calculate → |
| 295/75R16 | 33.42" | +4.62% | +70 mm | 62.8 mph | calculate → |
| 235/80R16 | 30.80" | -3.57% | +10 mm | 57.9 mph | calculate → |
| 33x10.50R16 | 33.00" | +3.30% | +42 mm | 62.0 mph | calculate → |
| 33x12.50R16 | 33.00" | +3.30% | +93 mm | 62.0 mph | calculate → |
| 32x11.50R16 | 32.00" | +0.17% | +67 mm | 60.1 mph | calculate → |
| 285/70R16 | 31.71" | -0.74% | +60 mm | 59.6 mph | calculate → |
| 31x12.50R16 | 31.00" | -2.96% | +93 mm | 58.2 mph | calculate → |
| 33x11.50R16 | 33.00" | +3.30% | +67 mm | 62.0 mph | calculate → |
| 33x13.00R16 | 33.00" | +3.30% | +105 mm | 62.0 mph | calculate → |
| 285/65R16 | 30.59" | -4.25% | +60 mm | 57.4 mph | calculate → |
| 32x10.00R16 | 32.00" | +0.17% | +29 mm | 60.1 mph | calculate → |
| 32x9.00R16 | 32.00" | +0.17% | +4 mm | 60.1 mph | calculate → |
| 265/80R16 | 32.69" | +2.34% | +40 mm | 61.4 mph | calculate → |
| 31x10.50R16 | 31.00" | -2.96% | +42 mm | 58.2 mph | calculate → |
| 31x11.50R16 | 31.00" | -2.96% | +67 mm | 58.2 mph | calculate → |
| 31x11.00R16 | 31.00" | -2.96% | +54 mm | 58.2 mph | calculate → |
| 33x13.50R16 | 33.00" | +3.30% | +118 mm | 62.0 mph | calculate → |
| 33x14.50R16 | 33.00" | +3.30% | +143 mm | 62.0 mph | calculate → |
| 33x14.00R16 | 33.00" | +3.30% | +131 mm | 62.0 mph | calculate → |
| 33x9.50R16 | 33.00" | +3.30% | +16 mm | 62.0 mph | calculate → |
| 33.5x16.50R16 | 33.50" | +4.87% | +194 mm | 62.9 mph | calculate → |
| 225/85R16 | 31.06" | -2.77% | 0 mm | 58.3 mph | calculate → |
Plus / minus sizing: 15" and 17" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 235/80R17 common | 31.80" | -0.44% | +10 mm | 59.7 mph | calculate → |
| 255/75R17 | 32.06" | +0.36% | +30 mm | 60.2 mph | calculate → |
| 275/70R17 | 32.16" | +0.67% | +50 mm | 60.4 mph | calculate → |
| 32x11.50R15 | 32.00" | +0.17% | +67 mm | 60.1 mph | calculate → |
| 32x10.50R15 | 32.00" | +0.17% | +42 mm | 60.1 mph | calculate → |
| 32x10.00R15 | 32.00" | +0.17% | +29 mm | 60.1 mph | calculate → |
| 32x11.50R17 | 32.00" | +0.17% | +67 mm | 60.1 mph | calculate → |
| 32x14.00R15 | 32.00" | +0.17% | +131 mm | 60.1 mph | calculate → |
| 32x16.00R15 | 32.00" | +0.17% | +181 mm | 60.1 mph | calculate → |
| 32x17.50R15 | 32.00" | +0.17% | +220 mm | 60.1 mph | calculate → |
| 32x9.50R15 | 32.00" | +0.17% | +16 mm | 60.1 mph | calculate → |
| 315/60R17 | 31.88" | -0.20% | +90 mm | 59.9 mph | calculate → |
| 32x10.50R17 | 32.00" | +0.17% | +42 mm | 60.1 mph | calculate → |
| 32x18.50R15 | 32.00" | +0.17% | +245 mm | 60.1 mph | calculate → |
Try another size against 225/90R16
Questions
What size is 225/90R16 in inches?
225/90R16 is about 31.9" tall and 8.9" wide on a 16-inch rim — roughly a 32x9.00R16 in inch sizing.
What does 225/90R16 mean?
225 mm section width, sidewall 90% of the width (7.97"), radial construction, 16-inch rim.
What tire sizes are equivalent to 225/90R16?
On the same 16" rim, within 3% of the diameter: 32x10.00R16 (+0.17%), 32x11.50R16 (+0.17%), 32x9.00R16 (+0.17%), 235/85R16 (-0.68%), 285/70R16 (-0.74%), 265/75R16 (-0.92%).
How many revolutions per mile does a 225/90R16 tire make?
About 631 revolutions per mile (circumference 100.4").
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.