Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/45-15 | 185/100-15 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.04 (610.5) | 29.57 (751) | 5.53 (140.5) 23% |
| Width inches (mm) | 10.04 (255) | 7.28 (185) | -2.76 (-70) -27.5% |
| Circum. inches (mm) | 75.51 (1917.94) | 92.89 (2359.34) | 17.38 (441.39) 23% |
| Sidewall Height inches (mm) | 4.52 (114.75) | 7.28 (185) | 2.77 (70.25) 61.2% |
| Revolutions per mile (km) | 839.1 (521.39) | 682.12 (423.85) | -156.98 (-97.54) -18.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.6 mph (39.59 km/h) |
| 25 mph (40.23 km/h) | 30.75 mph (49.49 km/h) |
| 30 mph (48.28 km/h) | 36.9 mph (59.39 km/h) |
| 35 mph (56.33 km/h) | 43.05 mph (69.29 km/h) |
| 40 mph (64.37 km/h) | 49.21 mph (79.19 km/h) |
| 45 mph (72.42 km/h) | 55.36 mph (89.09 km/h) |
| 50 mph (80.47 km/h) | 61.51 mph (98.99 km/h) |
| 55 mph (88.51 km/h) | 67.66 mph (108.88 km/h) |
| 60 mph (96.56 km/h) | 73.81 mph (118.78 km/h) |
| 65 mph (104.61 km/h) | 79.96 mph (128.68 km/h) |
| 70 mph (112.65 km/h) | 86.11 mph (138.58 km/h) |
| 75 mph (120.7 km/h) | 92.26 mph (148.48 km/h) |
| 80 mph (128.75 km/h) | 98.41 mph (158.38 km/h) |
| 85 mph (136.79 km/h) | 104.56 mph (168.28 km/h) |
| 90 mph (144.84 km/h) | 110.71 mph (178.17 km/h) |
| 95 mph (152.89 km/h) | 116.86 mph (188.07 km/h) |
| 100 mph (160.93 km/h) | 123.01 mph (197.97 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1736 | 2017 | 2172 | 2268 | 2371 | 2445 | 2526 | 2622 | 2755 | 2888 | 3036 | 3154 | 3368 | 3605 | 3789 | 3908 | 3974 | 4218 | 4558 | 5296 |
Better Fuel Economy Factory Ratios Increased Power
