Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 145/80-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 21.13 (536.8) | 1.99 (50.5) 10.4% |
| Width inches (mm) | 6.5 (165) | 5.71 (145) | -0.79 (-20) -12.1% |
| Circum. inches (mm) | 60.15 (1527.76) | 66.39 (1686.41) | 6.25 (158.65) 10.4% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.57 (116) | 0.99 (25.25) 27.8% |
| Revolutions per mile (km) | 1053.4 (654.55) | 954.3 (592.98) | -99.1 (-61.58) -9.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.08 mph (35.53 km/h) |
| 25 mph (40.23 km/h) | 27.6 mph (44.41 km/h) |
| 30 mph (48.28 km/h) | 33.12 mph (53.29 km/h) |
| 35 mph (56.33 km/h) | 38.63 mph (62.18 km/h) |
| 40 mph (64.37 km/h) | 44.15 mph (71.06 km/h) |
| 45 mph (72.42 km/h) | 49.67 mph (79.94 km/h) |
| 50 mph (80.47 km/h) | 55.19 mph (88.82 km/h) |
| 55 mph (88.51 km/h) | 60.71 mph (97.71 km/h) |
| 60 mph (96.56 km/h) | 66.23 mph (106.59 km/h) |
| 65 mph (104.61 km/h) | 71.75 mph (115.47 km/h) |
| 70 mph (112.65 km/h) | 77.27 mph (124.35 km/h) |
| 75 mph (120.7 km/h) | 82.79 mph (133.24 km/h) |
| 80 mph (128.75 km/h) | 88.31 mph (142.12 km/h) |
| 85 mph (136.79 km/h) | 93.83 mph (151 km/h) |
| 90 mph (144.84 km/h) | 99.35 mph (159.88 km/h) |
| 95 mph (152.89 km/h) | 104.87 mph (168.76 km/h) |
| 100 mph (160.93 km/h) | 110.38 mph (177.65 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
