Originally Posted by zonatandem

Have used/tested STI, DI-2 and most other shifting systems in our 40+ years of tandeming, and guess what???
Went back to 9- speed bar end shifters. Easy to use, reliable, less hassle and no fidgeting and a heck of a lot less expen$ive!
Just our opinion and experience.
Pedal on!
Rudy and Kay/zonatandem