Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-12 | 165/65-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.13 (536.8) | 21.44 (544.7) | 0.31 (7.9) 1.5% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 66.39 (1686.41) | 67.37 (1711.23) | 0.98 (24.82) 1.5% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.22 (107.25) | -0.34 (-8.75) -7.5% |
| Revolutions per mile (km) | 954.3 (592.98) | 940.46 (584.38) | -13.84 (-8.6) -1.5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.29 mph (32.66 km/h) |
| 25 mph (40.23 km/h) | 25.37 mph (40.83 km/h) |
| 30 mph (48.28 km/h) | 30.44 mph (48.99 km/h) |
| 35 mph (56.33 km/h) | 35.52 mph (57.16 km/h) |
| 40 mph (64.37 km/h) | 40.59 mph (65.32 km/h) |
| 45 mph (72.42 km/h) | 45.66 mph (73.49 km/h) |
| 50 mph (80.47 km/h) | 50.74 mph (81.65 km/h) |
| 55 mph (88.51 km/h) | 55.81 mph (89.82 km/h) |
| 60 mph (96.56 km/h) | 60.88 mph (97.98 km/h) |
| 65 mph (104.61 km/h) | 65.96 mph (106.15 km/h) |
| 70 mph (112.65 km/h) | 71.03 mph (114.31 km/h) |
| 75 mph (120.7 km/h) | 76.1 mph (122.48 km/h) |
| 80 mph (128.75 km/h) | 81.18 mph (130.64 km/h) |
| 85 mph (136.79 km/h) | 86.25 mph (138.81 km/h) |
| 90 mph (144.84 km/h) | 91.32 mph (146.97 km/h) |
| 95 mph (152.89 km/h) | 96.4 mph (155.14 km/h) |
| 100 mph (160.93 km/h) | 101.47 mph (163.3 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
