Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/100-18 | 100/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.45 (697.2) | 24.3 (617.2) | -3.15 (-80) -11.5% |
| Width inches (mm) | 4.72 (120) | 3.94 (100) | -0.79 (-20) -16.7% |
| Circum. inches (mm) | 86.23 (2190.32) | 76.34 (1938.99) | -9.89 (-251.33) -11.5% |
| Sidewall Height inches (mm) | 4.72 (120) | 3.15 (80) | -1.57 (-40) -33.3% |
| Revolutions per mile (km) | 734.75 (456.55) | 829.99 (515.73) | 95.24 (59.18) 13% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 17.71 mph (28.49 km/h) |
| 25 mph (40.23 km/h) | 22.13 mph (35.62 km/h) |
| 30 mph (48.28 km/h) | 26.56 mph (42.74 km/h) |
| 35 mph (56.33 km/h) | 30.98 mph (49.86 km/h) |
| 40 mph (64.37 km/h) | 35.41 mph (56.99 km/h) |
| 45 mph (72.42 km/h) | 39.84 mph (64.11 km/h) |
| 50 mph (80.47 km/h) | 44.26 mph (71.23 km/h) |
| 55 mph (88.51 km/h) | 48.69 mph (78.36 km/h) |
| 60 mph (96.56 km/h) | 53.12 mph (85.48 km/h) |
| 65 mph (104.61 km/h) | 57.54 mph (92.6 km/h) |
| 70 mph (112.65 km/h) | 61.97 mph (99.73 km/h) |
| 75 mph (120.7 km/h) | 66.39 mph (106.85 km/h) |
| 80 mph (128.75 km/h) | 70.82 mph (113.97 km/h) |
| 85 mph (136.79 km/h) | 75.25 mph (121.1 km/h) |
| 90 mph (144.84 km/h) | 79.67 mph (128.22 km/h) |
| 95 mph (152.89 km/h) | 84.1 mph (135.34 km/h) |
| 100 mph (160.93 km/h) | 88.53 mph (142.47 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
