Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-18 | 100/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.38 (619.2) | 24.3 (617.2) | -0.08 (-2) -0.3% |
| Width inches (mm) | 3.54 (90) | 3.94 (100) | 0.39 (10) 11.1% |
| Circum. inches (mm) | 76.59 (1945.27) | 76.34 (1938.99) | -0.25 (-6.28) -0.3% |
| Sidewall Height inches (mm) | 3.19 (81) | 3.15 (80) | -0.04 (-1) -1.2% |
| Revolutions per mile (km) | 827.31 (514.07) | 829.99 (515.73) | 2.68 (1.67) 0.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.94 mph (32.08 km/h) |
| 25 mph (40.23 km/h) | 24.92 mph (40.1 km/h) |
| 30 mph (48.28 km/h) | 29.9 mph (48.12 km/h) |
| 35 mph (56.33 km/h) | 34.89 mph (56.15 km/h) |
| 40 mph (64.37 km/h) | 39.87 mph (64.17 km/h) |
| 45 mph (72.42 km/h) | 44.85 mph (72.19 km/h) |
| 50 mph (80.47 km/h) | 49.84 mph (80.21 km/h) |
| 55 mph (88.51 km/h) | 54.82 mph (88.23 km/h) |
| 60 mph (96.56 km/h) | 59.81 mph (96.25 km/h) |
| 65 mph (104.61 km/h) | 64.79 mph (104.27 km/h) |
| 70 mph (112.65 km/h) | 69.77 mph (112.29 km/h) |
| 75 mph (120.7 km/h) | 74.76 mph (120.31 km/h) |
| 80 mph (128.75 km/h) | 79.74 mph (128.33 km/h) |
| 85 mph (136.79 km/h) | 84.73 mph (136.35 km/h) |
| 90 mph (144.84 km/h) | 89.71 mph (144.37 km/h) |
| 95 mph (152.89 km/h) | 94.69 mph (152.39 km/h) |
| 100 mph (160.93 km/h) | 99.68 mph (160.41 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
