Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-12 | 185/70-12 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 19.15 (486.3) | 22.2 (563.8) | 3.05 (77.5) 15.9% |
| Width inches (mm) | 6.5 (165) | 7.28 (185) | 0.79 (20) 12.1% |
| Circum. inches (mm) | 60.15 (1527.76) | 69.73 (1771.23) | 9.59 (243.47) 15.9% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 5.1 (129.5) | 1.53 (38.75) 42.7% |
| Revolutions per mile (km) | 1053.4 (654.55) | 908.6 (564.58) | -144.8 (-89.97) -13.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.19 mph (37.32 km/h) |
| 25 mph (40.23 km/h) | 28.98 mph (46.65 km/h) |
| 30 mph (48.28 km/h) | 34.78 mph (55.97 km/h) |
| 35 mph (56.33 km/h) | 40.58 mph (65.3 km/h) |
| 40 mph (64.37 km/h) | 46.37 mph (74.63 km/h) |
| 45 mph (72.42 km/h) | 52.17 mph (83.96 km/h) |
| 50 mph (80.47 km/h) | 57.97 mph (93.29 km/h) |
| 55 mph (88.51 km/h) | 63.77 mph (102.62 km/h) |
| 60 mph (96.56 km/h) | 69.56 mph (111.95 km/h) |
| 65 mph (104.61 km/h) | 75.36 mph (121.28 km/h) |
| 70 mph (112.65 km/h) | 81.16 mph (130.61 km/h) |
| 75 mph (120.7 km/h) | 86.95 mph (139.94 km/h) |
| 80 mph (128.75 km/h) | 92.75 mph (149.27 km/h) |
| 85 mph (136.79 km/h) | 98.55 mph (158.59 km/h) |
| 90 mph (144.84 km/h) | 104.34 mph (167.92 km/h) |
| 95 mph (152.89 km/h) | 110.14 mph (177.25 km/h) |
| 100 mph (160.93 km/h) | 115.94 mph (186.58 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2312 | 2686 | 2893 | 3021 | 3158 | 3257 | 3365 | 3493 | 3670 | 3847 | 4044 | 4201 | 4487 | 4802 | 5048 | 5205 | 5294 | 5618 | 6071 | 7055 |
Better Fuel Economy Factory Ratios Increased Power
