Agree with this last post. Myself, I prefer a deraileur.to IGH. I could imagine getting a P line and adding a couple of gears, but it would not give me that much for the money. As it is, I have a three speed derailleur B 160% range, but it is adequate for the flat lands I live on. I think one of the problems with making a multispeed derailleur for Brompton is that they want to be able to fold it reliably in any gear.