175/90R17 tire size
175/90R17 is a metric size: 29.4" tall, 6.9" wide, on a 17" rim — about a 29.5x7.00R17. The sidewall is 6.2" and the tire turns 686 times per mile.
175/90R17 specs
| Overall diameter (height) | 29.40" · 747 mm |
|---|---|
| Section width | 6.89" · 175 mm |
| Sidewall height | 6.20" · 158 mm (90% of width) |
| Rim diameter | 17" |
| Circumference | 92.37" · 2.346 m |
| Revolutions per mile | 686 (426 per km) |
| Inch (flotation) equivalent | 29.5x7.00R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 225/65R17 common | 28.52" | -3.01% | +50 mm | 58.2 mph | calculate → |
| 235/65R17 common | 29.03" | -1.27% | +60 mm | 59.2 mph | calculate → |
| 245/65R17 common | 29.54" | +0.47% | +70 mm | 60.3 mph | calculate → |
| 245/70R17 common | 30.50" | +3.75% | +70 mm | 62.2 mph | calculate → |
| 265/65R17 common | 30.56" | +3.95% | +90 mm | 62.4 mph | calculate → |
| 235/60R17 common | 28.10" | -4.42% | +60 mm | 57.3 mph | calculate → |
| 215/65R17 common | 28.00" | -4.75% | +40 mm | 57.1 mph | calculate → |
| 255/65R17 common | 30.05" | +2.21% | +80 mm | 61.3 mph | calculate → |
| 235/70R17 | 29.95" | +1.87% | +60 mm | 61.1 mph | calculate → |
| 255/60R17 | 29.05" | -1.21% | +80 mm | 59.3 mph | calculate → |
| 225/75R17 | 30.29" | +3.01% | +50 mm | 61.8 mph | calculate → |
| 275/55R17 | 28.91" | -1.67% | +100 mm | 59.0 mph | calculate → |
| 275/60R17 | 29.99" | +2.01% | +100 mm | 61.2 mph | calculate → |
| 265/60R17 | 29.52" | +0.40% | +90 mm | 60.2 mph | calculate → |
| 215/70R17 | 28.85" | -1.87% | +40 mm | 58.9 mph | calculate → |
| 165/90R17 | 28.69" | -2.41% | -10 mm | 58.6 mph | calculate → |
| 255/55R17 | 28.04" | -4.62% | +80 mm | 57.2 mph | calculate → |
| 155/90R17 | 27.98" | -4.82% | -20 mm | 57.1 mph | calculate → |
| 315/55R17 | 30.64" | +4.22% | +140 mm | 62.5 mph | calculate → |
| 28x6.00R17 | 28.00" | -4.77% | -23 mm | 57.1 mph | calculate → |
| 225/70R17 | 29.40" | 0.00% | +50 mm | 60.0 mph | calculate → |
| 245/60R17 | 28.57" | -2.81% | +70 mm | 58.3 mph | calculate → |
| 285/60R17 | 30.46" | +3.62% | +110 mm | 62.2 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 245/60R18 common | 29.57" | +0.59% | +70 mm | 60.4 mph | calculate → |
| 225/75R16 common | 29.29" | -0.39% | +50 mm | 59.8 mph | calculate → |
| 245/70R16 common | 29.50" | +0.35% | +70 mm | 60.2 mph | calculate → |
| 285/50R18 | 29.22" | -0.62% | +110 mm | 59.6 mph | calculate → |
| 165/90R18 | 29.69" | +0.99% | -10 mm | 60.6 mph | calculate → |
| 285/60R16 | 29.46" | +0.21% | +110 mm | 60.1 mph | calculate → |
| 325/45R18 | 29.52" | +0.39% | +150 mm | 60.2 mph | calculate → |
| 265/55R18 | 29.48" | +0.25% | +90 mm | 60.2 mph | calculate → |
| 225/65R18 | 29.52" | +0.39% | +50 mm | 60.2 mph | calculate → |
Try another size against 175/90R17
Questions
What size is 175/90R17 in inches?
175/90R17 is about 29.4" tall and 6.9" wide on a 17-inch rim — roughly a 29.5x7.00R17 in inch sizing.
What does 175/90R17 mean?
175 mm section width, sidewall 90% of the width (6.20"), radial construction, 17-inch rim.
What tire sizes are equivalent to 175/90R17?
On the same 17" rim, within 3% of the diameter: 225/70R17 (0.00%), 265/60R17 (+0.40%), 245/65R17 (+0.47%), 255/60R17 (-1.21%), 235/65R17 (-1.27%), 275/55R17 (-1.67%).
How many revolutions per mile does a 175/90R17 tire make?
About 686 revolutions per mile (circumference 92.4").
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.