Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 90/90-18 | 90/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.38 (619.2) | 22.96 (583.2) | -1.42 (-36) -5.8% |
| Width inches (mm) | 3.54 (90) | 3.54 (90) | 0 (0) 0% |
| Circum. inches (mm) | 76.59 (1945.27) | 72.13 (1832.18) | -4.45 (-113.1) -5.8% |
| Sidewall Height inches (mm) | 3.19 (81) | 2.48 (63) | -0.71 (-18) -22.2% |
| Revolutions per mile (km) | 827.31 (514.07) | 878.38 (545.8) | 51.07 (31.73) 6.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.84 mph (30.32 km/h) |
| 25 mph (40.23 km/h) | 23.55 mph (37.89 km/h) |
| 30 mph (48.28 km/h) | 28.26 mph (45.47 km/h) |
| 35 mph (56.33 km/h) | 32.97 mph (53.05 km/h) |
| 40 mph (64.37 km/h) | 37.67 mph (60.63 km/h) |
| 45 mph (72.42 km/h) | 42.38 mph (68.21 km/h) |
| 50 mph (80.47 km/h) | 47.09 mph (75.79 km/h) |
| 55 mph (88.51 km/h) | 51.8 mph (83.37 km/h) |
| 60 mph (96.56 km/h) | 56.51 mph (90.95 km/h) |
| 65 mph (104.61 km/h) | 61.22 mph (98.53 km/h) |
| 70 mph (112.65 km/h) | 65.93 mph (106.1 km/h) |
| 75 mph (120.7 km/h) | 70.64 mph (113.68 km/h) |
| 80 mph (128.75 km/h) | 75.35 mph (121.26 km/h) |
| 85 mph (136.79 km/h) | 80.06 mph (128.84 km/h) |
| 90 mph (144.84 km/h) | 84.77 mph (136.42 km/h) |
| 95 mph (152.89 km/h) | 89.48 mph (144 km/h) |
| 100 mph (160.93 km/h) | 94.19 mph (151.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2235 | 2597 | 2797 | 2920 | 3053 | 3148 | 3253 | 3377 | 3548 | 3719 | 3909 | 4062 | 4337 | 4642 | 4880 | 5032 | 5117 | 5431 | 5869 | 6820 |
Better Fuel Economy Factory Ratios Increased Power
