We utilize Dura Ace caliper brake on front and Tektro Mini-V on rear of our tandem.
Koolstop Eagle-2 brakepads on rear and (the original) D/A pads on front with 34,000+ miles on the odo.
Works great for us even in hilly Arizona.
Pedal on TWOgether!
Rudy and Kay/zonatandem