My current tandem has 170mm cranks for both captain and stoker. I like to spin, but most of my stokers are quite a bit less experienced as cyclists and don't like to spin as much. I have to really watch myself to keep the revs down.

The new tandem that I'm getting comes with 172.5mm (captain) and 170mm (stoker) cranks, but 165mm cranks are available for the stoker. I'm leaning toward the 165mm cranks.

Is anyone running a 7.5mm (or more?) gap in crank lengths between captain and stoker?