Just traded off a ROO 21SS for a Shamrock 21BD.
Was having trouble with the slide out on the ROO.
Purchased the 21BD at a dealer 6 hours from home.
Removed the brackets for my hitch from the ROO and
installed them on the 21BD myself. It took 20 min and
they fit just fine. Unaware, I left the dealer with a full
fresh water tank. I never travel with water in the fresh
water tank. There was no difference towing the 21BD
full of water compared to ROO.
Almost bought a 21DK, but looked at a brochure for a
21BD and ordered it instead. Glad I did. IMO, better
floor plan and now have a good place to haul the bikes.