I would like to have bike fitting session but I am not sure how they can use trainer on my Speed TR... with Dual Drive & Click box.... Is there a way around it? (other than maybe installing some other 20" rim, etc)
YEA remove the click box and shifting rod from the hub, or put a common 20" wheel needs to be with a 135 wide axle in it,
but why bother with a bike fitting, just change the stem length to what feels better,
If what came out of the box is not satisfactory, unless you just like hanging around in bike shops..
Nature of folding bikes [other than BF] is they only make one, but adjustments of stem and saddle position compensate.
FWIW I liked working in a community bike shop where the regulars came by. WABAC ..
gonna be difficult........ as folding bikes are ridden very different than full size bikes the regular sizing methods are not working for folders usually....
different ridden I mean that you hardly ever get out of the saddle, usually higher cadence while keeping the butt firmly planted is the much prefered method of climbing for example......
you just need to find the most comfortable position and than just use your bike
dont worry about small details