Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-12 | 165/70-13 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 21.13 (536.8) | 22.09 (561.2) | 0.96 (24.4) 4.5% |
| Width inches (mm) | 5.71 (145) | 6.5 (165) | 0.79 (20) 13.8% |
| Circum. inches (mm) | 66.39 (1686.41) | 69.41 (1763.06) | 3.02 (76.65) 4.5% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.55 (115.5) | -0.02 (-0.5) -0.4% |
| Revolutions per mile (km) | 954.3 (592.98) | 912.81 (567.19) | -41.49 (-25.78) -4.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.91 mph (33.65 km/h) |
| 25 mph (40.23 km/h) | 26.14 mph (42.06 km/h) |
| 30 mph (48.28 km/h) | 31.36 mph (50.47 km/h) |
| 35 mph (56.33 km/h) | 36.59 mph (58.89 km/h) |
| 40 mph (64.37 km/h) | 41.82 mph (67.3 km/h) |
| 45 mph (72.42 km/h) | 47.05 mph (75.71 km/h) |
| 50 mph (80.47 km/h) | 52.27 mph (84.12 km/h) |
| 55 mph (88.51 km/h) | 57.5 mph (92.54 km/h) |
| 60 mph (96.56 km/h) | 62.73 mph (100.95 km/h) |
| 65 mph (104.61 km/h) | 67.95 mph (109.36 km/h) |
| 70 mph (112.65 km/h) | 73.18 mph (117.77 km/h) |
| 75 mph (120.7 km/h) | 78.41 mph (126.19 km/h) |
| 80 mph (128.75 km/h) | 83.64 mph (134.6 km/h) |
| 85 mph (136.79 km/h) | 88.86 mph (143.01 km/h) |
| 90 mph (144.84 km/h) | 94.09 mph (151.42 km/h) |
| 95 mph (152.89 km/h) | 99.32 mph (159.84 km/h) |
| 100 mph (160.93 km/h) | 104.55 mph (168.25 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2323 | 2699 | 2906 | 3035 | 3173 | 3272 | 3381 | 3509 | 3687 | 3865 | 4063 | 4221 | 4507 | 4824 | 5071 | 5229 | 5318 | 5644 | 6099 | 7087 |
Better Fuel Economy Factory Ratios Increased Power
