Jockey wheel range measured at the tow vehicle’s tongue upper surface – the mounting face for the DO35 pin:
Trailer Ball Height Range Standard and Low Jockey Wheel
| MODEL | XTRK/XPLOR | GT | NEXUS/XSCAPE/X25 |
|---|---|---|---|
| Wheel Size/Diameter | 265/70R16 (Ø778mm) | 265/70R17 (Ø803mm) +12.5 | 285/65R18 | 305/65R17 (Ø828mm) +12.5 |
| When Camper is Level | 620mm | 633mm | 645mm |
| Tall (standard) Jockey Wheel A00067 at Maximum | 876mm | 889mm | 901mm |
| Tall (standard) Jockey Wheel A00067 at Minimum | 392mm | 405mm | 417mm |
| Low Jockey Wheel A00068 at Maximum | 805mm | 818mm | 830mm |
| Low Jockey Wheel A00068 at Minimum | 319mm | 332mm | 344mm |
These are the absolute maximum and minimums; bearing seat on the internal threaded shaft bottomed out on the jockey wheel’s internal tube as a minimum, with maximum being the thread would completely out of the inner tube.
It’d be best to take ~10mm off each extreme.