Originally Posted by
Onegun
Yes. They work fine. A stem riser is subject to its maximum stress from a strong rider pulling on the bars in a climb, and that's the same on a tandem as it is for a single. No more concern necessary than on a single.
Same here. We run a Satori (aka Zoom and other brands) on a Cannondale Road Tandem. It's absolutely as sturdy as a 'normal' stem would be.