Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/70-17 | 100/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 22.51 (571.8) | 25.09 (637.2) | 2.57 (65.4) 11.4% |
| Width inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Circum. inches (mm) | 70.72 (1796.36) | 78.81 (2001.82) | 8.09 (205.46) 11.4% |
| Sidewall Height inches (mm) | 2.76 (70) | 3.54 (90) | 0.79 (20) 28.6% |
| Revolutions per mile (km) | 895.89 (556.68) | 803.94 (499.54) | -91.95 (-57.14) -10.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.29 mph (35.87 km/h) |
| 25 mph (40.23 km/h) | 27.86 mph (44.84 km/h) |
| 30 mph (48.28 km/h) | 33.43 mph (53.8 km/h) |
| 35 mph (56.33 km/h) | 39 mph (62.77 km/h) |
| 40 mph (64.37 km/h) | 44.58 mph (71.74 km/h) |
| 45 mph (72.42 km/h) | 50.15 mph (80.7 km/h) |
| 50 mph (80.47 km/h) | 55.72 mph (89.67 km/h) |
| 55 mph (88.51 km/h) | 61.29 mph (98.64 km/h) |
| 60 mph (96.56 km/h) | 66.86 mph (107.61 km/h) |
| 65 mph (104.61 km/h) | 72.43 mph (116.57 km/h) |
| 70 mph (112.65 km/h) | 78.01 mph (125.54 km/h) |
| 75 mph (120.7 km/h) | 83.58 mph (134.51 km/h) |
| 80 mph (128.75 km/h) | 89.15 mph (143.47 km/h) |
| 85 mph (136.79 km/h) | 94.72 mph (152.44 km/h) |
| 90 mph (144.84 km/h) | 100.29 mph (161.41 km/h) |
| 95 mph (152.89 km/h) | 105.87 mph (170.37 km/h) |
| 100 mph (160.93 km/h) | 111.44 mph (179.34 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2046 | 2377 | 2560 | 2673 | 2795 | 2882 | 2977 | 3091 | 3247 | 3404 | 3578 | 3717 | 3970 | 4248 | 4466 | 4605 | 4684 | 4971 | 5372 | 6242 |
Better Fuel Economy Factory Ratios Increased Power
