Looks like the hubs are already in the the outer most position, about all you can do is move the wheel to the outside for max width. As mentioned, if loaded with liquid ballast they can be a bear to handle.
After that Wheel spacers would be in order to go any wider.
Personally I think all 3Rs really should have wheel spacers to get them stable, especially on a cab model.
After that Wheel spacers would be in order to go any wider.
Personally I think all 3Rs really should have wheel spacers to get them stable, especially on a cab model.