Tire Size
Indicates tire size for calibrating the speedometer. The control module uses the wheel circumference and vehicle speed to calculate the speed displayed.
The following options can be selected:
| Tire size | Tire circumference |
| 185/65 R14 | 1814 mm |
| 185/65 R15 | 1894 mm |
| 195/55 R15 | 1814 mm |
| 195/60 R15 (US only) | 1866 mm |
| 195/60 R15 (HD chassis) | 1874 mm |
| 195/60 R15 | 1874 mm |
| 205/55 R15 | 1850 mm |
| 205/50 R15 | 1790 mm |
| 205/50 R16 | 1866 mm |
| 205/45 R16 | 1798 mm |
| 205/45 R17 | 1878 mm |