Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/80-18 | 100/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.3 (617.2) | 25.09 (637.2) | 0.79 (20) 3.2% |
| Width inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Circum. inches (mm) | 76.34 (1938.99) | 78.81 (2001.82) | 2.47 (62.83) 3.2% |
| Sidewall Height inches (mm) | 3.15 (80) | 3.54 (90) | 0.39 (10) 12.5% |
| Revolutions per mile (km) | 829.99 (515.73) | 803.94 (499.54) | -26.05 (-16.19) -3.1% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.65 mph (33.23 km/h) |
| 25 mph (40.23 km/h) | 25.81 mph (41.54 km/h) |
| 30 mph (48.28 km/h) | 30.97 mph (49.84 km/h) |
| 35 mph (56.33 km/h) | 36.13 mph (58.15 km/h) |
| 40 mph (64.37 km/h) | 41.3 mph (66.46 km/h) |
| 45 mph (72.42 km/h) | 46.46 mph (74.77 km/h) |
| 50 mph (80.47 km/h) | 51.62 mph (83.07 km/h) |
| 55 mph (88.51 km/h) | 56.78 mph (91.38 km/h) |
| 60 mph (96.56 km/h) | 61.94 mph (99.69 km/h) |
| 65 mph (104.61 km/h) | 67.11 mph (108 km/h) |
| 70 mph (112.65 km/h) | 72.27 mph (116.3 km/h) |
| 75 mph (120.7 km/h) | 77.43 mph (124.61 km/h) |
| 80 mph (128.75 km/h) | 82.59 mph (132.92 km/h) |
| 85 mph (136.79 km/h) | 87.75 mph (141.23 km/h) |
| 90 mph (144.84 km/h) | 92.92 mph (149.53 km/h) |
| 95 mph (152.89 km/h) | 98.08 mph (157.84 km/h) |
| 100 mph (160.93 km/h) | 103.24 mph (166.15 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
