28.5" tall, 11.6" wide, 5.2" sidewall
A 295/45R18 tire is 28.5 inches (723 mm) tall and 11.6 inches wide. The sidewall is 45% of the width, 5.2 inches, on a 18-inch wheel, and the tire turns about 709 times per mile.
In flotation terms that is about 28.5x11.6R18. People often call it a 28-inch tire.
The size most often compared with it is 285/45R18, which is 0.4" shorter (−1.2%). At an indicated 60 mph you would be doing 59.3 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 18" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 295/45R18 | |
|---|---|---|---|---|---|
| 285/45R18 | 28.1" | 11.2" | 5.0" | −1.2% | |
| 275/50R18 | 28.8" | 10.8" | 5.4" | +1.3% | |
| 275/45R18 | 27.7" | 10.8" | 4.9" | −2.5% | |
| 285/50R18 | 29.2" | 11.2" | 5.6" | +2.7% | |
| 295/40R18 | 27.3" | 11.6" | 4.6" | −4.1% | |
| 275/55R18 | 29.9" | 10.8" | 6.0" | +5.1% | |
| 285/40R18 | 27.0" | 11.2" | 4.5" | −5.2% | |
| 275/40R18 | 26.7" | 10.8" | 4.3" | −6.3% | |
| 285/55R18 | 30.3" | 11.2" | 6.2" | +6.6% | |
| 305/35R18 | 26.4" | 12.0" | 4.2" | −7.2% |
Sizes within 2% of 28.5" on 17" or 16" or 20" wheels.
| Size | Diameter | Width | Sidewall | vs 295/45R18 | |
|---|---|---|---|---|---|
| 325/45R17 | 28.5" | 12.8" | 5.8" | +0.2% | |
| 245/65R16 | 28.5" | 9.6" | 6.3" | +0.3% | |
| 245/60R17 | 28.6" | 9.6" | 5.8" | +0.4% | |
| 315/35R20 | 28.7" | 12.4" | 4.3" | +0.8% | |
| 345/30R20 | 28.1" | 13.6" | 4.1" | −1.1% | |
| 295/35R20 | 28.1" | 11.6" | 4.1" | −1.1% |
Actual speed when the speedometer is calibrated for 295/45R18.
| Speedometer shows | on 285/45R18 | on 275/50R18 | on 275/45R18 |
|---|---|---|---|
| 30 mph | 29.6 mph | 30.4 mph | 29.3 mph |
| 45 mph | 44.4 mph | 45.6 mph | 43.9 mph |
| 60 mph | 59.3 mph | 60.8 mph | 58.5 mph |
| 70 mph | 69.1 mph | 70.9 mph | 68.3 mph |
28.5 inches (723 mm). The sidewall is 5.2 inches.
11.6 inches (295 mm) section width, measured sidewall to sidewall.
About 28.5x11.6R18.
285/45R18 is −1.2% in diameter, within the common 3% guideline. It is 0.4" narrower.