My Catrike 700 Black gets Red's crankset and Red will get a ???. The FSA SL K Carbon crank with a 26t granny gear and guard worked so well on Red that I put it on Black to get a lower granny gear so I can take a few more hills riding Black. The change added less then 2ozs. I rode 18 miles today and gained over 1,100 feet. The lower gear on my light Black worked great and effectively extended the riding range of Black.
Maybe a Schlumpf Mountain Drive on trucker? More on that later.
Tire Cassette Crank