Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-19 | 120/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.38 (644.6) | 25.56 (649.2) | 0.18 (4.6) 0.7% |
| Width inches (mm) | 3.54 (90) | 4.72 (120) | 1.18 (30) 33.3% |
| Circum. inches (mm) | 79.73 (2025.07) | 80.3 (2039.52) | 0.57 (14.45) 0.7% |
| Sidewall Height inches (mm) | 3.19 (81) | 3.78 (96) | 0.59 (15) 18.5% |
| Revolutions per mile (km) | 794.71 (493.81) | 789.08 (490.31) | -5.63 (-3.5) -0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.14 mph (32.42 km/h) |
| 25 mph (40.23 km/h) | 25.18 mph (40.52 km/h) |
| 30 mph (48.28 km/h) | 30.21 mph (48.62 km/h) |
| 35 mph (56.33 km/h) | 35.25 mph (56.73 km/h) |
| 40 mph (64.37 km/h) | 40.29 mph (64.83 km/h) |
| 45 mph (72.42 km/h) | 45.32 mph (72.94 km/h) |
| 50 mph (80.47 km/h) | 50.36 mph (81.04 km/h) |
| 55 mph (88.51 km/h) | 55.39 mph (89.15 km/h) |
| 60 mph (96.56 km/h) | 60.43 mph (97.25 km/h) |
| 65 mph (104.61 km/h) | 65.46 mph (105.35 km/h) |
| 70 mph (112.65 km/h) | 70.5 mph (113.46 km/h) |
| 75 mph (120.7 km/h) | 75.54 mph (121.56 km/h) |
| 80 mph (128.75 km/h) | 80.57 mph (129.67 km/h) |
| 85 mph (136.79 km/h) | 85.61 mph (137.77 km/h) |
| 90 mph (144.84 km/h) | 90.64 mph (145.87 km/h) |
| 95 mph (152.89 km/h) | 95.68 mph (153.98 km/h) |
| 100 mph (160.93 km/h) | 100.71 mph (162.08 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
