Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-12 | 165/80-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.13 (536.8) | 23.39 (594.2) | 2.26 (57.4) 10.7% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 66.39 (1686.41) | 73.49 (1866.73) | 7.1 (180.33) 10.7% |
| Sidewall Height inches (mm) | 4.57 (116) | 5.2 (132) | 0.63 (16) 13.8% |
| Revolutions per mile (km) | 954.3 (592.98) | 862.12 (535.69) | -92.19 (-57.28) -9.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.14 mph (35.63 km/h) |
| 25 mph (40.23 km/h) | 27.67 mph (44.54 km/h) |
| 30 mph (48.28 km/h) | 33.21 mph (53.44 km/h) |
| 35 mph (56.33 km/h) | 38.74 mph (62.35 km/h) |
| 40 mph (64.37 km/h) | 44.28 mph (71.26 km/h) |
| 45 mph (72.42 km/h) | 49.81 mph (80.16 km/h) |
| 50 mph (80.47 km/h) | 55.35 mph (89.07 km/h) |
| 55 mph (88.51 km/h) | 60.88 mph (97.98 km/h) |
| 60 mph (96.56 km/h) | 66.42 mph (106.89 km/h) |
| 65 mph (104.61 km/h) | 71.95 mph (115.79 km/h) |
| 70 mph (112.65 km/h) | 77.49 mph (124.7 km/h) |
| 75 mph (120.7 km/h) | 83.02 mph (133.61 km/h) |
| 80 mph (128.75 km/h) | 88.55 mph (142.51 km/h) |
| 85 mph (136.79 km/h) | 94.09 mph (151.42 km/h) |
| 90 mph (144.84 km/h) | 99.62 mph (160.33 km/h) |
| 95 mph (152.89 km/h) | 105.16 mph (169.24 km/h) |
| 100 mph (160.93 km/h) | 110.69 mph (178.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2194 | 2549 | 2745 | 2866 | 2997 | 3090 | 3193 | 3314 | 3482 | 3650 | 3837 | 3986 | 4257 | 4556 | 4789 | 4939 | 5023 | 5331 | 5760 | 6694 |
Better Fuel Economy Factory Ratios Increased Power
