Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-18 | 110/90-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.8 (655.2) | 1.18 (30) 4.8% |
| Width inches (mm) | 4.72 (120) | 4.33 (110) | -0.39 (-10) -8.3% |
| Circum. inches (mm) | 77.33 (1964.12) | 81.04 (2058.37) | 3.71 (94.25) 4.8% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.9 (99) | 0.59 (15) 17.9% |
| Revolutions per mile (km) | 819.37 (509.13) | 781.85 (485.82) | -37.52 (-23.31) -4.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.96 mph (33.73 km/h) |
| 25 mph (40.23 km/h) | 26.2 mph (42.16 km/h) |
| 30 mph (48.28 km/h) | 31.44 mph (50.6 km/h) |
| 35 mph (56.33 km/h) | 36.68 mph (59.03 km/h) |
| 40 mph (64.37 km/h) | 41.92 mph (67.46 km/h) |
| 45 mph (72.42 km/h) | 47.16 mph (75.9 km/h) |
| 50 mph (80.47 km/h) | 52.4 mph (84.33 km/h) |
| 55 mph (88.51 km/h) | 57.64 mph (92.76 km/h) |
| 60 mph (96.56 km/h) | 62.88 mph (101.19 km/h) |
| 65 mph (104.61 km/h) | 68.12 mph (109.63 km/h) |
| 70 mph (112.65 km/h) | 73.36 mph (118.06 km/h) |
| 75 mph (120.7 km/h) | 78.6 mph (126.49 km/h) |
| 80 mph (128.75 km/h) | 83.84 mph (134.93 km/h) |
| 85 mph (136.79 km/h) | 89.08 mph (143.36 km/h) |
| 90 mph (144.84 km/h) | 94.32 mph (151.79 km/h) |
| 95 mph (152.89 km/h) | 99.56 mph (160.22 km/h) |
| 100 mph (160.93 km/h) | 104.8 mph (168.66 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1990 | 2311 | 2489 | 2599 | 2718 | 2802 | 2896 | 3006 | 3158 | 3310 | 3480 | 3615 | 3861 | 4132 | 4343 | 4479 | 4555 | 4834 | 5224 | 6071 |
Better Fuel Economy Factory Ratios Increased Power
