Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-12 | 165/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.13 (536.8) | 22.39 (568.8) | 1.26 (32) 6% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 66.39 (1686.41) | 70.35 (1786.94) | 3.96 (100.53) 6% |
| Sidewall Height inches (mm) | 4.57 (116) | 5.2 (132) | 0.63 (16) 13.8% |
| Revolutions per mile (km) | 954.3 (592.98) | 900.62 (559.62) | -53.69 (-33.36) -5.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.19 mph (34.11 km/h) |
| 25 mph (40.23 km/h) | 26.49 mph (42.63 km/h) |
| 30 mph (48.28 km/h) | 31.79 mph (51.16 km/h) |
| 35 mph (56.33 km/h) | 37.09 mph (59.68 km/h) |
| 40 mph (64.37 km/h) | 42.38 mph (68.21 km/h) |
| 45 mph (72.42 km/h) | 47.68 mph (76.74 km/h) |
| 50 mph (80.47 km/h) | 52.98 mph (85.26 km/h) |
| 55 mph (88.51 km/h) | 58.28 mph (93.79 km/h) |
| 60 mph (96.56 km/h) | 63.58 mph (102.32 km/h) |
| 65 mph (104.61 km/h) | 68.87 mph (110.84 km/h) |
| 70 mph (112.65 km/h) | 74.17 mph (119.37 km/h) |
| 75 mph (120.7 km/h) | 79.47 mph (127.9 km/h) |
| 80 mph (128.75 km/h) | 84.77 mph (136.42 km/h) |
| 85 mph (136.79 km/h) | 90.07 mph (144.95 km/h) |
| 90 mph (144.84 km/h) | 95.37 mph (153.48 km/h) |
| 95 mph (152.89 km/h) | 100.66 mph (162 km/h) |
| 100 mph (160.93 km/h) | 105.96 mph (170.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2292 | 2662 | 2867 | 2994 | 3131 | 3228 | 3335 | 3462 | 3638 | 3813 | 4008 | 4164 | 4447 | 4759 | 5003 | 5159 | 5247 | 5569 | 6017 | 6993 |
Better Fuel Economy Factory Ratios Increased Power
