Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/100-18 | 120/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 27.45 (697.2) | 1.57 (40) 6.1% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 81.29 (2064.65) | 86.23 (2190.32) | 4.95 (125.66) 6.1% |
| Sidewall Height inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Revolutions per mile (km) | 779.47 (484.34) | 734.75 (456.55) | -44.72 (-27.79) -5.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.22 mph (34.15 km/h) |
| 25 mph (40.23 km/h) | 26.52 mph (42.68 km/h) |
| 30 mph (48.28 km/h) | 31.83 mph (51.22 km/h) |
| 35 mph (56.33 km/h) | 37.13 mph (59.76 km/h) |
| 40 mph (64.37 km/h) | 42.43 mph (68.29 km/h) |
| 45 mph (72.42 km/h) | 47.74 mph (76.83 km/h) |
| 50 mph (80.47 km/h) | 53.04 mph (85.36 km/h) |
| 55 mph (88.51 km/h) | 58.35 mph (93.9 km/h) |
| 60 mph (96.56 km/h) | 63.65 mph (102.44 km/h) |
| 65 mph (104.61 km/h) | 68.96 mph (110.97 km/h) |
| 70 mph (112.65 km/h) | 74.26 mph (119.51 km/h) |
| 75 mph (120.7 km/h) | 79.56 mph (128.05 km/h) |
| 80 mph (128.75 km/h) | 84.87 mph (136.58 km/h) |
| 85 mph (136.79 km/h) | 90.17 mph (145.12 km/h) |
| 90 mph (144.84 km/h) | 95.48 mph (153.66 km/h) |
| 95 mph (152.89 km/h) | 100.78 mph (162.19 km/h) |
| 100 mph (160.93 km/h) | 106.09 mph (170.73 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1870 | 2172 | 2339 | 2443 | 2554 | 2634 | 2721 | 2825 | 2968 | 3111 | 3270 | 3397 | 3628 | 3883 | 4082 | 4209 | 4281 | 4543 | 4909 | 5705 |
Better Fuel Economy Factory Ratios Increased Power
