Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/90-18 | 100/100-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 25.87 (657.2) | -0.63 (-16) -2.4% |
| Width inches (mm) | 4.72 (120) | 3.94 (100) | -0.79 (-20) -16.7% |
| Circum. inches (mm) | 83.26 (2114.92) | 81.29 (2064.65) | -1.98 (-50.27) -2.4% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.94 (100) | -0.31 (-8) -7.4% |
| Revolutions per mile (km) | 760.95 (472.83) | 779.47 (484.34) | 18.53 (11.51) 2.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.52 mph (31.42 km/h) |
| 25 mph (40.23 km/h) | 24.41 mph (39.28 km/h) |
| 30 mph (48.28 km/h) | 29.29 mph (47.13 km/h) |
| 35 mph (56.33 km/h) | 34.17 mph (54.99 km/h) |
| 40 mph (64.37 km/h) | 39.05 mph (62.84 km/h) |
| 45 mph (72.42 km/h) | 43.93 mph (70.7 km/h) |
| 50 mph (80.47 km/h) | 48.81 mph (78.55 km/h) |
| 55 mph (88.51 km/h) | 53.69 mph (86.41 km/h) |
| 60 mph (96.56 km/h) | 58.57 mph (94.27 km/h) |
| 65 mph (104.61 km/h) | 63.46 mph (102.12 km/h) |
| 70 mph (112.65 km/h) | 68.34 mph (109.98 km/h) |
| 75 mph (120.7 km/h) | 73.22 mph (117.83 km/h) |
| 80 mph (128.75 km/h) | 78.1 mph (125.69 km/h) |
| 85 mph (136.79 km/h) | 82.98 mph (133.54 km/h) |
| 90 mph (144.84 km/h) | 87.86 mph (141.4 km/h) |
| 95 mph (152.89 km/h) | 92.74 mph (149.25 km/h) |
| 100 mph (160.93 km/h) | 97.62 mph (157.11 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
