Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 120/70-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 18.61 (472.8) | 21.13 (536.8) | 2.52 (64) 13.5% |
| Width inches (mm) | 4.72 (120) | 5.71 (145) | 0.98 (25) 20.8% |
| Circum. inches (mm) | 58.48 (1485.35) | 66.39 (1686.41) | 7.92 (201.06) 13.5% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.57 (116) | 1.26 (32) 38.1% |
| Revolutions per mile (km) | 1083.48 (673.24) | 954.3 (592.98) | -129.18 (-80.27) -11.9% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.71 mph (36.54 km/h) |
| 25 mph (40.23 km/h) | 28.38 mph (45.68 km/h) |
| 30 mph (48.28 km/h) | 34.06 mph (54.82 km/h) |
| 35 mph (56.33 km/h) | 39.74 mph (63.95 km/h) |
| 40 mph (64.37 km/h) | 45.41 mph (73.09 km/h) |
| 45 mph (72.42 km/h) | 51.09 mph (82.22 km/h) |
| 50 mph (80.47 km/h) | 56.77 mph (91.36 km/h) |
| 55 mph (88.51 km/h) | 62.45 mph (100.5 km/h) |
| 60 mph (96.56 km/h) | 68.12 mph (109.63 km/h) |
| 65 mph (104.61 km/h) | 73.8 mph (118.77 km/h) |
| 70 mph (112.65 km/h) | 79.48 mph (127.9 km/h) |
| 75 mph (120.7 km/h) | 85.15 mph (137.04 km/h) |
| 80 mph (128.75 km/h) | 90.83 mph (146.18 km/h) |
| 85 mph (136.79 km/h) | 96.51 mph (155.31 km/h) |
| 90 mph (144.84 km/h) | 102.18 mph (164.45 km/h) |
| 95 mph (152.89 km/h) | 107.86 mph (173.58 km/h) |
| 100 mph (160.93 km/h) | 113.54 mph (182.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Better Fuel Economy Factory Ratios Increased Power
