185/70R17 tire size in inches
A 185/70R17 tire measures
27.2" tall × 7.3" wide
5.10" sidewall on a 17" wheel. 742 revolutions per mile.
185/70R17 means a tire 185 mm wide, with sidewalls 70% as tall as the tire is wide (130 mm), radial construction (R), for a 17 inch wheel.
185/70R17 specs
| Overall diameter (height) | 27.20 inches (691 mm) |
|---|---|
| Section width | 7.28 inches (185 mm) |
| Sidewall height | 5.10 inches (130 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 85.4 inches (2,170 mm) |
| Revolutions per mile | 742 |
| Revolutions per kilometer | 461 |
| Approximate rim width | 5.0" to 6.5" |
| In inches (flotation style) | 27.2x7.3R17 |
| Aspect ratio | 70% |
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 185/70R17 on a 17" wheel
These 17" sizes are within 3% of 185/70R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/55R17 | 27.18" | 9.25" | −0.1% | 60.0 mph | Compare |
| 215/60R17 | 27.16" | 8.46" | −0.1% | 59.9 mph | Compare |
| 285/45R17 | 27.10" | 11.22" | −0.4% | 59.8 mph | Compare |
| 255/50R17 | 27.04" | 10.04" | −0.6% | 59.7 mph | Compare |
| 195/65R17 | 26.98" | 7.68" | −0.8% | 59.5 mph | Compare |
| 265/50R17 | 27.43" | 10.43" | +0.9% | 60.5 mph | Compare |
| 295/45R17 | 27.45" | 11.61" | +0.9% | 60.6 mph | Compare |
| 315/40R17 | 26.92" | 12.40" | −1.0% | 59.4 mph | Compare |
| 205/65R17 | 27.49" | 8.07" | +1.1% | 60.7 mph | Compare |
| 245/55R17 | 27.61" | 9.65" | +1.5% | 60.9 mph | Compare |
| 225/60R17 | 27.63" | 8.86" | +1.6% | 61.0 mph | Compare |
| 225/55R17 | 26.74" | 8.86" | −1.7% | 59.0 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 225/35R21 | 21" | 27.20" | 0.0% | Compare |
| 315/25R21 | 21" | 27.20" | 0.0% | Compare |
| 305/30R20 | 20" | 27.20" | 0.0% | Compare |
| 195/60R18 | 18" | 27.21" | +0.1% | Compare |
| 265/25R22 | 22" | 27.22" | +0.1% | Compare |
| 225/80R13 | 13" | 27.17" | −0.1% | Compare |
| 285/50R16 | 16" | 27.22" | +0.1% | Compare |
| 335/35R18 | 18" | 27.23" | +0.1% | Compare |
| 345/30R19 | 19" | 27.15" | −0.2% | Compare |
| 235/50R18 | 18" | 27.25" | +0.2% | Compare |
| 265/30R21 | 21" | 27.26" | +0.2% | Compare |
| 295/35R19 | 19" | 27.13" | −0.2% | Compare |
One size up or down
- 195/70R17wider: 27.7" × 7.7"
- 185/65R17lower profile: 26.5" × 7.3"
- 185/75R17taller sidewall: 27.9" × 7.3"
Compare 185/70R17 with another size
Questions
- How tall is a 185/70R17 tire?
- A 185/70R17 tire is 27.2 inches tall (691 mm), calculated from the size. It is 7.3 inches wide with 5.1 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 185/70R17 mean?
- 185/70R17 means a tire 185 mm wide, with sidewalls 70% as tall as the tire is wide (130 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 185/70R17 tire make?
- About 742 revolutions per mile, based on a circumference of 85.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 185/70R17 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 235/55R17 instead of 185/70R17?
- 235/55R17 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.