Originally Posted by CenturionIM

Hey OP, I think this may have to do with your folding bike. I have both road bikes and a folding bike; when riding my folding bike I noticed that I tend to smash more and put more stress on my knee. The seat height was properly adjusted and the folder has 9 gears so those are not the reasons. I think there is something about the geometry that makes me smash. On road bikes I have significantly less problems.