185/55R17 tire size in inches
A 185/55R17 tire measures
25.0" tall × 7.3" wide
4.01" sidewall on a 17" wheel. 806 revolutions per mile.
185/55R17 means a tire 185 mm wide, with sidewalls 55% as tall as the tire is wide (102 mm), radial construction (R), for a 17 inch wheel.
185/55R17 specs
| Overall diameter (height) | 25.01 inches (635 mm) |
|---|---|
| Section width | 7.28 inches (185 mm) |
| Sidewall height | 4.01 inches (102 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 78.6 inches (1,996 mm) |
| Revolutions per mile | 806 |
| Revolutions per kilometer | 501 |
| Approximate rim width | 5.0" to 6.5" |
| In inches (flotation style) | 25.0x7.3R17 |
| Aspect ratio | 55% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 185/55R17 on a 17" wheel
These 17" sizes are within 3% of 185/55R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/40R17 | 25.03" | 10.04" | +0.1% | 60.0 mph | Compare |
| 225/45R17 | 24.97" | 8.86" | −0.2% | 59.9 mph | Compare |
| 205/50R17 | 25.07" | 8.07" | +0.2% | 60.1 mph | Compare |
| 295/35R17 | 25.13" | 11.61" | +0.5% | 60.3 mph | Compare |
| 285/35R17 | 24.85" | 11.22" | −0.6% | 59.6 mph | Compare |
| 245/40R17 | 24.72" | 9.65" | −1.2% | 59.3 mph | Compare |
| 235/45R17 | 25.33" | 9.25" | +1.3% | 60.8 mph | Compare |
| 195/50R17 | 24.68" | 7.68" | −1.3% | 59.2 mph | Compare |
| 265/40R17 | 25.35" | 10.43" | +1.3% | 60.8 mph | Compare |
| 215/45R17 | 24.62" | 8.46" | −1.6% | 59.1 mph | Compare |
| 305/35R17 | 25.41" | 12.01" | +1.6% | 60.9 mph | Compare |
| 195/55R17 | 25.44" | 7.68" | +1.7% | 61.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 255/25R20 | 20" | 25.02" | 0.0% | Compare |
| 215/65R14 | 14" | 25.00" | 0.0% | Compare |
| 305/25R19 | 19" | 25.00" | 0.0% | Compare |
| 175/80R14 | 14" | 25.02" | 0.0% | Compare |
| 255/30R19 | 19" | 25.02" | 0.0% | Compare |
| 235/65R13 | 13" | 25.03" | +0.1% | Compare |
| 255/35R18 | 18" | 25.03" | +0.1% | Compare |
| 255/45R16 | 16" | 25.04" | +0.1% | Compare |
| 255/50R15 | 15" | 25.04" | +0.1% | Compare |
| 165/85R14 | 14" | 25.04" | +0.1% | Compare |
| 195/65R15 | 15" | 24.98" | −0.1% | Compare |
| 255/55R14 | 14" | 25.04" | +0.1% | Compare |
One size up or down
- 195/55R17wider: 25.4" × 7.7"
- 185/50R17lower profile: 24.3" × 7.3"
- 185/60R17taller sidewall: 25.7" × 7.3"
Compare 185/55R17 with another size
Questions
- How tall is a 185/55R17 tire?
- A 185/55R17 tire is 25.0 inches tall (635 mm), calculated from the size. It is 7.3 inches wide with 4.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 185/55R17 mean?
- 185/55R17 means a tire 185 mm wide, with sidewalls 55% as tall as the tire is wide (102 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 185/55R17 tire make?
- About 806 revolutions per mile, based on a circumference of 78.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 185/55R17 tire?
- Roughly 5.0" to 6.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/40R17 instead of 185/55R17?
- 255/40R17 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.