Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-18 | 100/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 24.3 (617.2) | -0.79 (-20) -3.1% |
| Width inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Circum. inches (mm) | 78.81 (2001.82) | 76.34 (1938.99) | -2.47 (-62.83) -3.1% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.15 (80) | -0.39 (-10) -11.1% |
| Revolutions per mile (km) | 803.94 (499.54) | 829.99 (515.73) | 26.05 (16.19) 3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.37 mph (31.18 km/h) |
| 25 mph (40.23 km/h) | 24.22 mph (38.97 km/h) |
| 30 mph (48.28 km/h) | 29.06 mph (46.77 km/h) |
| 35 mph (56.33 km/h) | 33.9 mph (54.56 km/h) |
| 40 mph (64.37 km/h) | 38.74 mph (62.35 km/h) |
| 45 mph (72.42 km/h) | 43.59 mph (70.15 km/h) |
| 50 mph (80.47 km/h) | 48.43 mph (77.94 km/h) |
| 55 mph (88.51 km/h) | 53.27 mph (85.74 km/h) |
| 60 mph (96.56 km/h) | 58.12 mph (93.53 km/h) |
| 65 mph (104.61 km/h) | 62.96 mph (101.32 km/h) |
| 70 mph (112.65 km/h) | 67.8 mph (109.12 km/h) |
| 75 mph (120.7 km/h) | 72.65 mph (116.91 km/h) |
| 80 mph (128.75 km/h) | 77.49 mph (124.71 km/h) |
| 85 mph (136.79 km/h) | 82.33 mph (132.5 km/h) |
| 90 mph (144.84 km/h) | 87.18 mph (140.3 km/h) |
| 95 mph (152.89 km/h) | 92.02 mph (148.09 km/h) |
| 100 mph (160.93 km/h) | 96.86 mph (155.88 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2112 | 2454 | 2642 | 2759 | 2885 | 2975 | 3074 | 3191 | 3353 | 3514 | 3694 | 3838 | 4099 | 4386 | 4611 | 4755 | 4836 | 5132 | 5546 | 6444 |
Better Fuel Economy Factory Ratios Increased Power
