1. mount both 26" and 20" wheels w/o 20" wheel adaptor
2. able to put in van with complete bike w/o taking off front wheel and it will be stable enough not to fall over during drive. so i essence use as a stand
3. able to use as a bike repair stand

if i can get 2 and 3 and get a trainer with adaptors for smaller wheels, then i guess that would be the next best thing

problem is that all the conversions seem to be more permanent than temporary switches. i ask for this cuz my so rides BMX and i am MTN
thanks all