While the stem can technically be installed on some flat bar bikes, the 55mm and 70mm stems will provide little to no suspension if installed with flat bars due to the single pivot design. 

The ShockStop technology absorbs vibration by rotating about its pivot point, which is just in front of where the stem attaches to the steerer tube. Because it pivots, only loads that are in front of the pivot point will actually cause the stem to flex. The 55mm and 70mm lengths do not allow for flat bars to be far enough in front of the pivot point to initiate movement like a drop bar setup, especially since most flat bars have some degree of backsweep.

We definitely recognize that there is a growing demand for flat bar suspension solutions and our engineering team is hard at work on future products that will prioritize performance on flat bar bikes!