I bought an 80's vintage Miyata 215 ST road type sport touring bike, 3 x 6 speed with down tube shifters. I want to replace the drop handlebars with trekking (butterfly) bars like my Novara Safari, which has grip shifters. I found these SRAM MRX 21 Speed (3 x 7) Grip Shift on Amazon,
Robot Check . I think these will work. However, I have read enough to question whether the mountain bike shifters will operate the original FD on the Miyata, and if there is a preferred brake lever set to operate the cantilever brakes that were also original. Or should I throw caution to the wind and install trigger shifters? If so, which ones? I am not completely committed to a relationship with the grip twisting shift. My apologies for asking stupid questions.