24.9" tall, 8.9" wide, 4.4" sidewall
A 225/50R16 tire is 24.9 inches (631 mm) tall and 8.9 inches wide. The sidewall is 50% of the width, 4.4 inches, on a 16-inch wheel, and the tire turns about 811 times per mile.
In flotation terms that is about 24.9x8.9R16. People often call it a 25-inch tire.
The size most often compared with it is 215/50R16, which is 0.4" shorter (−1.6%). At an indicated 60 mph you would be doing 59.0 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 16" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 225/50R16 | |
|---|---|---|---|---|---|
| 215/50R16 | 24.5" | 8.5" | 4.2" | −1.6% | |
| 205/50R16 | 24.1" | 8.1" | 4.0" | −3.2% | |
| 245/50R16 | 25.6" | 9.6" | 4.8" | +3.2% |
Sizes within 2% of 24.9" on 14" or 18" or 17" wheels.
| Size | Diameter | Width | Sidewall | vs 225/50R16 | |
|---|---|---|---|---|---|
| 195/70R14 | 24.7" | 7.7" | 5.4" | −0.4% | |
| 295/30R18 | 25.0" | 11.6" | 3.5" | +0.4% | |
| 285/30R18 | 24.7" | 11.2" | 3.4" | −0.5% | |
| 245/40R17 | 24.7" | 9.6" | 3.9" | −0.6% | |
| 185/55R17 | 25.0" | 7.3" | 4.0" | +0.6% | |
| 255/35R18 | 25.0" | 10.0" | 3.5" | +0.7% |
Actual speed when the speedometer is calibrated for 225/50R16.
| Speedometer shows | on 215/50R16 | on 205/50R16 | on 245/50R16 |
|---|---|---|---|
| 30 mph | 29.5 mph | 29.0 mph | 31.0 mph |
| 45 mph | 44.3 mph | 43.6 mph | 46.4 mph |
| 60 mph | 59.0 mph | 58.1 mph | 61.9 mph |
| 70 mph | 68.9 mph | 67.8 mph | 72.2 mph |
24.9 inches (631 mm). The sidewall is 4.4 inches.
8.9 inches (225 mm) section width, measured sidewall to sidewall.
About 24.9x8.9R16.
215/50R16 is −1.6% in diameter, within the common 3% guideline. It is 0.4" narrower.