Originally Posted by
tandem rider
Nice work on the tandem rack. I like your stoker crank arms, are they Da Vinci?
Yes, both front and rear cranks are DaVinci. We have been playing with different lengths to get our short legs working right and to better sync our cadence. The triple hole arm is for a kid's stoker set. Allows 170, 150, and 130mm arm lengths without widening the stance by adding adaptors. For us it was great as we had the triple length, a set of 175, 165, and 160 arms that we could move front to back to try different combinations. We have settled on the 165mm front (my normal crank length) and 150mm in the rear for my wife... which is the middle hole on the triple.
You can see current offerings here:
https://www.davincitandems.com/components/
-simon