I have done the conversion both ways. It is not tandem specific. I get what parts I don't already have from any online retailer that has what I am looking for. This is the most recent conversion from FSA drop bars with Shimano Flightdeck brifters to a 31.8 center section flatbar and three finger long pull brake levers and Shimano Rapidfire trigger shifters. It matters a whole lot what your brake types are (v-brake, canti, disc) and what kind of shifters you have now (brifter, bar end). If I know what you have at present I will have a pretty good idea of what you need for a conversion.