Originally Posted by wahoonc
In Dahon.Steve's case I suspect the folding and unfolding was causing the adjustment to go screwy. I have heard of this problem before, especially in folders.
Aaron
Good point.
I also happen to believe if you're going to be aggressive with the bike, the frame can flex causing the bike to shift in neutral due to the cables shifting. I could not recommend the OP applying his full weight on the cranks because the results can be unexpected.