Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.99 (507.8) | 21.13 (536.8) | 1.14 (29) 5.7% |
| Width inches (mm) | 5.71 (145) | 5.71 (145) | 0 (0) 0% |
| Circum. inches (mm) | 62.81 (1595.3) | 66.39 (1686.41) | 3.59 (91.11) 5.7% |
| Sidewall Height inches (mm) | 4 (101.5) | 4.57 (116) | 0.57 (14.5) 14.3% |
| Revolutions per mile (km) | 1008.8 (626.84) | 954.3 (592.98) | -54.5 (-33.86) -5.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.14 mph (34.03 km/h) |
| 25 mph (40.23 km/h) | 26.43 mph (42.53 km/h) |
| 30 mph (48.28 km/h) | 31.71 mph (51.04 km/h) |
| 35 mph (56.33 km/h) | 37 mph (59.54 km/h) |
| 40 mph (64.37 km/h) | 42.28 mph (68.05 km/h) |
| 45 mph (72.42 km/h) | 47.57 mph (76.56 km/h) |
| 50 mph (80.47 km/h) | 52.86 mph (85.06 km/h) |
| 55 mph (88.51 km/h) | 58.14 mph (93.57 km/h) |
| 60 mph (96.56 km/h) | 63.43 mph (102.08 km/h) |
| 65 mph (104.61 km/h) | 68.71 mph (110.58 km/h) |
| 70 mph (112.65 km/h) | 74 mph (119.09 km/h) |
| 75 mph (120.7 km/h) | 79.28 mph (127.59 km/h) |
| 80 mph (128.75 km/h) | 84.57 mph (136.1 km/h) |
| 85 mph (136.79 km/h) | 89.85 mph (144.61 km/h) |
| 90 mph (144.84 km/h) | 95.14 mph (153.11 km/h) |
| 95 mph (152.89 km/h) | 100.43 mph (161.62 km/h) |
| 100 mph (160.93 km/h) | 105.71 mph (170.13 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
