Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 100/90-18 | 100/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 25.87 (657.2) | 0.79 (20) 3.1% |
| Width inches (mm) | 3.94 (100) | 3.94 (100) | 0 (0) 0% |
| Circum. inches (mm) | 78.81 (2001.82) | 81.29 (2064.65) | 2.47 (62.83) 3.1% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.94 (100) | 0.39 (10) 11.1% |
| Revolutions per mile (km) | 803.94 (499.54) | 779.47 (484.34) | -24.47 (-15.2) -3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.63 mph (33.2 km/h) |
| 25 mph (40.23 km/h) | 25.78 mph (41.5 km/h) |
| 30 mph (48.28 km/h) | 30.94 mph (49.8 km/h) |
| 35 mph (56.33 km/h) | 36.1 mph (58.1 km/h) |
| 40 mph (64.37 km/h) | 41.26 mph (66.39 km/h) |
| 45 mph (72.42 km/h) | 46.41 mph (74.69 km/h) |
| 50 mph (80.47 km/h) | 51.57 mph (82.99 km/h) |
| 55 mph (88.51 km/h) | 56.73 mph (91.29 km/h) |
| 60 mph (96.56 km/h) | 61.88 mph (99.59 km/h) |
| 65 mph (104.61 km/h) | 67.04 mph (107.89 km/h) |
| 70 mph (112.65 km/h) | 72.2 mph (116.19 km/h) |
| 75 mph (120.7 km/h) | 77.35 mph (124.49 km/h) |
| 80 mph (128.75 km/h) | 82.51 mph (132.79 km/h) |
| 85 mph (136.79 km/h) | 87.67 mph (141.09 km/h) |
| 90 mph (144.84 km/h) | 92.82 mph (149.39 km/h) |
| 95 mph (152.89 km/h) | 97.98 mph (157.69 km/h) |
| 100 mph (160.93 km/h) | 103.14 mph (165.99 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 2304 | 2482 | 2591 | 2710 | 2794 | 2887 | 2997 | 3148 | 3300 | 3469 | 3604 | 3849 | 4119 | 4330 | 4465 | 4541 | 4820 | 5208 | 6052 |
Better Fuel Economy Factory Ratios Increased Power
