Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/100-18 | 120/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 26.5 (673.2) | 0.63 (16) 2.4% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 81.29 (2064.65) | 83.26 (2114.92) | 1.98 (50.27) 2.4% |
| Sidewall Height inches (mm) | 3.94 (100) | 4.25 (108) | 0.31 (8) 8% |
| Revolutions per mile (km) | 779.47 (484.34) | 760.95 (472.83) | -18.53 (-11.51) -2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.49 mph (32.97 km/h) |
| 25 mph (40.23 km/h) | 25.61 mph (41.21 km/h) |
| 30 mph (48.28 km/h) | 30.73 mph (49.46 km/h) |
| 35 mph (56.33 km/h) | 35.85 mph (57.7 km/h) |
| 40 mph (64.37 km/h) | 40.97 mph (65.94 km/h) |
| 45 mph (72.42 km/h) | 46.1 mph (74.18 km/h) |
| 50 mph (80.47 km/h) | 51.22 mph (82.43 km/h) |
| 55 mph (88.51 km/h) | 56.34 mph (90.67 km/h) |
| 60 mph (96.56 km/h) | 61.46 mph (98.91 km/h) |
| 65 mph (104.61 km/h) | 66.58 mph (107.15 km/h) |
| 70 mph (112.65 km/h) | 71.7 mph (115.4 km/h) |
| 75 mph (120.7 km/h) | 76.83 mph (123.64 km/h) |
| 80 mph (128.75 km/h) | 81.95 mph (131.88 km/h) |
| 85 mph (136.79 km/h) | 87.07 mph (140.12 km/h) |
| 90 mph (144.84 km/h) | 92.19 mph (148.37 km/h) |
| 95 mph (152.89 km/h) | 97.31 mph (156.61 km/h) |
| 100 mph (160.93 km/h) | 102.43 mph (164.85 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
Better Fuel Economy Factory Ratios Increased Power
