Originally Posted by Mike Watters

I stopped looking seriously at these types of carriers after I double checked the van's manual for their recommended max tongue weight. Doesn't really matter that the hitch is rated for 500 if the vehicle doesn't want you having more than 350 back there.

Given that even a small bike (like a 250-500) is going to weigh something like 350lbs - and the carrier itself is another 100 - you're WAY past the vehicle's limit and nearly to that of the hitch itself. I don't see these as safe or advisable for anything but the smallest of scooters or dirtbikes.