Ok, I'm relatively new to tandeming, even though I've owned two (a Cannondale RT-2000 with V breaks and my current daVinci with disc). I ran into a friend of mine the other day on a ride out here in the East Bay and he and his lovely stoker were riding their new Pinarello tandem. Yup, that's what I said, a Pinarello! Here's a link http://www.precisiontandems.com/cat_files/pinarello.htm
I digress. He had disc breaks and a DuraAce road break and asked what was up with that. He said it's a drag break like I should've known. OK, I'll admit it, I don't know of the concept. I imagine it's to use as a back up. Also, the stoker had bar-ends to control the drag break.
What am I missing here and is this something I should add onto my daVinci??