The Brompton adapter is not an option, he would have to buy a new seatpost first..
OK ,spend the money..
Termonology problem appears.. Definition: Setback is a distance, from a plumb line through the BB
rearward to where you sit, a combination of seat tube angle, and it's length..
and then added to, by seat post design.
changing the handle bars is a separate issue..
Originally Posted by badmother
... Best to buy a bike that fits.
hard to do since other than Bike Friday folding bikes are only made in 1 size..