185/45R17 tire size in inches
A 185/45R17 tire measures
23.6" tall × 7.3" wide
3.28" sidewall on a 17" wheel. 856 revolutions per mile.
185/45R17 means a tire 185 mm wide, with sidewalls 45% as tall as the tire is wide (83 mm), radial construction (R), for a 17 inch wheel.
185/45R17 specs
| Overall diameter (height) | 23.56 inches (598 mm) |
|---|---|
| Section width | 7.28 inches (185 mm) |
| Sidewall height | 3.28 inches (83 mm) |
| Wheel (rim) diameter | 17 inches |
| Circumference | 74.0 inches (1,880 mm) |
| Revolutions per mile | 856 |
| Revolutions per kilometer | 532 |
| Approximate rim width | 6.0" to 7.5" |
| In inches (flotation style) | 23.6x7.3R17 |
| Aspect ratio | 45% |
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 185/45R17 on a 17" wheel
These 17" sizes are within 3% of 185/45R17's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 235/35R17 | 23.48" | 9.25" | −0.3% | 59.8 mph | Compare |
| 205/40R17 | 23.46" | 8.07" | −0.4% | 59.7 mph | Compare |
| 245/35R17 | 23.75" | 9.65" | +0.8% | 60.5 mph | Compare |
| 215/40R17 | 23.77" | 8.46" | +0.9% | 60.6 mph | Compare |
| 195/45R17 | 23.91" | 7.68" | +1.5% | 60.9 mph | Compare |
| 225/35R17 | 23.20" | 8.86" | −1.5% | 59.1 mph | Compare |
| 195/40R17 | 23.14" | 7.68" | −1.8% | 58.9 mph | Compare |
| 255/35R17 | 24.03" | 10.04" | +2.0% | 61.2 mph | Compare |
| 225/40R17 | 24.09" | 8.86" | +2.3% | 61.4 mph | Compare |
| 215/35R17 | 22.93" | 8.46" | −2.7% | 58.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 175/55R16 | 16" | 23.58" | +0.1% | Compare |
| 205/65R13 | 13" | 23.49" | −0.3% | Compare |
| 215/45R16 | 16" | 23.62" | +0.3% | Compare |
| 235/25R19 | 19" | 23.63" | +0.3% | Compare |
| 225/60R13 | 13" | 23.63" | +0.3% | Compare |
| 185/65R14 | 14" | 23.47" | −0.4% | Compare |
| 175/70R14 | 14" | 23.65" | +0.4% | Compare |
| 215/50R15 | 15" | 23.46" | −0.4% | Compare |
| 205/35R18 | 18" | 23.65" | +0.4% | Compare |
| 165/65R15 | 15" | 23.44" | −0.5% | Compare |
| 195/55R15 | 15" | 23.44" | −0.5% | Compare |
| 195/50R16 | 16" | 23.68" | +0.5% | Compare |
One size up or down
- 195/45R17wider: 23.9" × 7.7"
- 185/40R17lower profile: 22.8" × 7.3"
- 185/50R17taller sidewall: 24.3" × 7.3"
Compare 185/45R17 with another size
Questions
- How tall is a 185/45R17 tire?
- A 185/45R17 tire is 23.6 inches tall (598 mm), calculated from the size. It is 7.3 inches wide with 3.3 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 185/45R17 mean?
- 185/45R17 means a tire 185 mm wide, with sidewalls 45% as tall as the tire is wide (83 mm), radial construction (R), for a 17 inch wheel.
- How many revolutions per mile does a 185/45R17 tire make?
- About 856 revolutions per mile, based on a circumference of 74.0 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 185/45R17 tire?
- Roughly 6.0" to 7.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 235/35R17 instead of 185/45R17?
- 235/35R17 is −0.08 inches (−0.3%) in overall diameter, so at an indicated 60 mph you would be doing 59.8 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.