Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-18 | 120/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 27.45 (697.2) | 0.94 (24) 3.6% |
| Width inches (mm) | 4.72 (120) | 4.72 (120) | 0 (0) 0% |
| Circum. inches (mm) | 83.26 (2114.92) | 86.23 (2190.32) | 2.97 (75.4) 3.6% |
| Sidewall Height inches (mm) | 4.25 (108) | 4.72 (120) | 0.47 (12) 11.1% |
| Revolutions per mile (km) | 760.95 (472.83) | 734.75 (456.55) | -26.19 (-16.28) -3.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.71 mph (33.33 km/h) |
| 25 mph (40.23 km/h) | 25.89 mph (41.67 km/h) |
| 30 mph (48.28 km/h) | 31.07 mph (50 km/h) |
| 35 mph (56.33 km/h) | 36.25 mph (58.34 km/h) |
| 40 mph (64.37 km/h) | 41.43 mph (66.67 km/h) |
| 45 mph (72.42 km/h) | 46.6 mph (75 km/h) |
| 50 mph (80.47 km/h) | 51.78 mph (83.34 km/h) |
| 55 mph (88.51 km/h) | 56.96 mph (91.67 km/h) |
| 60 mph (96.56 km/h) | 62.14 mph (100 km/h) |
| 65 mph (104.61 km/h) | 67.32 mph (108.34 km/h) |
| 70 mph (112.65 km/h) | 72.5 mph (116.67 km/h) |
| 75 mph (120.7 km/h) | 77.67 mph (125 km/h) |
| 80 mph (128.75 km/h) | 82.85 mph (133.34 km/h) |
| 85 mph (136.79 km/h) | 88.03 mph (141.67 km/h) |
| 90 mph (144.84 km/h) | 93.21 mph (150 km/h) |
| 95 mph (152.89 km/h) | 98.39 mph (158.34 km/h) |
| 100 mph (160.93 km/h) | 103.57 mph (166.67 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
