I would suspect that Subarus suggestion of flatbed is a CYA. If the wheels aren't rolling (no wheels on ground rolling), then no damage can happen. But those wheel dollies aren't very stout and i've never seen them used on the interstate before, I'm surprised that was done. They're usually used around town.
I don't know if those wheel dolly's are legal in all states or on highways, but I could understand Subaru basically making no mention or not having regard for those in their statements and just leaning on a one-size-fits-all statement like "flat bed only". they'd never want to say "yes those are fine" if they represent liability or legal repercussions...
I don't know if those wheel dolly's are legal in all states or on highways, but I could understand Subaru basically making no mention or not having regard for those in their statements and just leaning on a one-size-fits-all statement like "flat bed only". they'd never want to say "yes those are fine" if they represent liability or legal repercussions...