Most dual hitch set ups come with a warning to reduce the tow capacity.
Any way to set up a bike rack on the dolly ?
I'll look for the warning.
EDIT: Reese Hitch has changed their web address, I'll have to dig around.
The three, hitches I can find at Camping World, come with a warning to reduce tow capacity to 4,000 lbs.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.