Just found this "older" thread.
We recently purchased a pair of Rad Power Mini's . They are folding bikes with 750 watt motors and 48 volt batteries.
They will run 20mph for 20 miles without pedaling .
Very nice bikes, high quality , fun to ride and they will be easy to pack on the rv.
The picture of the bikes on the rear platform was sent to me by a gentleman on the IRV2 Forum.
I have the same bikes and the same platform.
Headed to Cape Cod next month and then Disney after the first of the year, can't wait to use them.