Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 185/45-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 18.56 (471.3) | -0.59 (-15) -3.1% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 60.15 (1527.76) | 58.29 (1480.63) | -1.86 (-47.12) -3.1% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 3.28 (83.25) | -0.3 (-7.5) -8.3% |
| Revolutions per mile (km) | 1053.4 (654.55) | 1086.93 (675.39) | 33.53 (20.83) 3.2% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.38 mph (31.19 km/h) |
| 25 mph (40.23 km/h) | 24.23 mph (38.99 km/h) |
| 30 mph (48.28 km/h) | 29.07 mph (46.79 km/h) |
| 35 mph (56.33 km/h) | 33.92 mph (54.59 km/h) |
| 40 mph (64.37 km/h) | 38.77 mph (62.39 km/h) |
| 45 mph (72.42 km/h) | 43.61 mph (70.19 km/h) |
| 50 mph (80.47 km/h) | 48.46 mph (77.99 km/h) |
| 55 mph (88.51 km/h) | 53.3 mph (85.78 km/h) |
| 60 mph (96.56 km/h) | 58.15 mph (93.58 km/h) |
| 65 mph (104.61 km/h) | 63 mph (101.38 km/h) |
| 70 mph (112.65 km/h) | 67.84 mph (109.18 km/h) |
| 75 mph (120.7 km/h) | 72.69 mph (116.98 km/h) |
| 80 mph (128.75 km/h) | 77.53 mph (124.78 km/h) |
| 85 mph (136.79 km/h) | 82.38 mph (132.58 km/h) |
| 90 mph (144.84 km/h) | 87.22 mph (140.37 km/h) |
| 95 mph (152.89 km/h) | 92.07 mph (148.17 km/h) |
| 100 mph (160.93 km/h) | 96.92 mph (155.97 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
