185/45R16 tire size in inches
A 185/45R16 tire measures
22.6" tall × 7.3" wide
3.28" sidewall on a 16" wheel. 894 revolutions per mile.
185/45R16 means a tire 185 mm wide, with sidewalls 45% as tall as the tire is wide (83 mm), radial construction (R), for a 16 inch wheel.
185/45R16 specs
| Overall diameter (height) | 22.56 inches (573 mm) |
|---|---|
| Section width | 7.28 inches (185 mm) |
| Sidewall height | 3.28 inches (83 mm) |
| Wheel (rim) diameter | 16 inches |
| Circumference | 70.9 inches (1,800 mm) |
| Revolutions per mile | 894 |
| Revolutions per kilometer | 556 |
| Approximate rim width | 6.0" to 7.5" |
| In inches (flotation style) | 22.6x7.3R16 |
| 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 185/45R16 on a 16" wheel
These 16" sizes are within 3% of 185/45R16's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 205/40R16 | 22.46" | 8.07" | −0.4% | 59.7 mph | Compare |
| 215/40R16 | 22.77" | 8.46" | +1.0% | 60.6 mph | Compare |
| 195/45R16 | 22.91" | 7.68" | +1.6% | 60.9 mph | Compare |
| 195/40R16 | 22.14" | 7.68" | −1.8% | 58.9 mph | Compare |
| 225/40R16 | 23.09" | 8.86" | +2.4% | 61.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 155/70R14 | 14" | 22.54" | −0.1% | Compare |
| 175/55R15 | 15" | 22.58" | +0.1% | Compare |
| 215/45R15 | 15" | 22.62" | +0.3% | Compare |
| 185/65R13 | 13" | 22.47" | −0.4% | Compare |
| 175/70R13 | 13" | 22.65" | +0.4% | Compare |
| 205/35R17 | 17" | 22.65" | +0.4% | Compare |
| 165/65R14 | 14" | 22.44" | −0.5% | Compare |
| 195/55R14 | 14" | 22.44" | −0.5% | Compare |
| 195/50R15 | 15" | 22.68" | +0.5% | Compare |
| 205/60R13 | 13" | 22.69" | +0.6% | Compare |
| 145/85R13 | 13" | 22.70" | +0.7% | Compare |
| 195/35R17 | 17" | 22.37" | −0.8% | Compare |
One size up or down
Compare 185/45R16 with another size
Questions
- How tall is a 185/45R16 tire?
- A 185/45R16 tire is 22.6 inches tall (573 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 185/45R16 mean?
- 185/45R16 means a tire 185 mm wide, with sidewalls 45% as tall as the tire is wide (83 mm), radial construction (R), for a 16 inch wheel.
- How many revolutions per mile does a 185/45R16 tire make?
- About 894 revolutions per mile, based on a circumference of 70.9 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 185/45R16 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 205/40R16 instead of 185/45R16?
- 205/40R16 is −0.10 inches (−0.4%) in overall diameter, so at an indicated 60 mph you would be doing 59.7 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.