Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/80-18 | 120/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.3 (617.2) | 25.56 (649.2) | 1.26 (32) 5.2% |
| Width inches (mm) | 3.94 (100) | 4.72 (120) | 0.79 (20) 20% |
| Circum. inches (mm) | 76.34 (1938.99) | 80.3 (2039.52) | 3.96 (100.53) 5.2% |
| Sidewall Height inches (mm) | 3.15 (80) | 3.78 (96) | 0.63 (16) 20% |
| Revolutions per mile (km) | 829.99 (515.73) | 789.08 (490.31) | -40.91 (-25.42) -4.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.04 mph (33.86 km/h) |
| 25 mph (40.23 km/h) | 26.3 mph (42.32 km/h) |
| 30 mph (48.28 km/h) | 31.56 mph (50.78 km/h) |
| 35 mph (56.33 km/h) | 36.81 mph (59.25 km/h) |
| 40 mph (64.37 km/h) | 42.07 mph (67.71 km/h) |
| 45 mph (72.42 km/h) | 47.33 mph (76.18 km/h) |
| 50 mph (80.47 km/h) | 52.59 mph (84.64 km/h) |
| 55 mph (88.51 km/h) | 57.85 mph (93.1 km/h) |
| 60 mph (96.56 km/h) | 63.11 mph (101.57 km/h) |
| 65 mph (104.61 km/h) | 68.37 mph (110.03 km/h) |
| 70 mph (112.65 km/h) | 73.63 mph (118.5 km/h) |
| 75 mph (120.7 km/h) | 78.89 mph (126.96 km/h) |
| 80 mph (128.75 km/h) | 84.15 mph (135.42 km/h) |
| 85 mph (136.79 km/h) | 89.41 mph (143.89 km/h) |
| 90 mph (144.84 km/h) | 94.67 mph (152.35 km/h) |
| 95 mph (152.89 km/h) | 99.93 mph (160.81 km/h) |
| 100 mph (160.93 km/h) | 105.18 mph (169.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2008 | 2333 | 2512 | 2623 | 2743 | 2828 | 2922 | 3033 | 3187 | 3341 | 3512 | 3649 | 3896 | 4170 | 4384 | 4520 | 4597 | 4879 | 5272 | 6127 |
Better Fuel Economy Factory Ratios Increased Power
