Thanks for all replies. My folder is a very light Dahon Helios SL w/8 speed cassett. The handle bar stim is fixed and I'm considering how to modify it to add a stim if anyone has ever done this. Maybe an adjustable stim and road type turn down handlebars. Also what would be a good way to add a small hill climbing touring front chainring and shifter. What brifters would work with this. I posted this here as some may have upgraded their folders in a similar manner. Whaat other mods should I consider.