My internal geared 16" folder has been losing the chain on just about every bump. I'm trying my darnedest to pull the wheel back, tighten the heck out of the nuts and get moving again, getting the chain good and taught. But the first good bump I hit, and the chain is off again and when replaecd, back to being loose as a piece of spaghetti.
The wheel seems to be slipping right back to where it wants to be instead of staying back where I put it. And I KNOW I'm tightening it with more force than I use for other bikes. Last night I really was thorough, and adjusted the brake pads and everything, but my chain was still off three times on the ride in.
And no, I can't avoid the bumps. This is hard urban riding in two notoriously dilapidated cities in heavy traffic.
I'm not experienced with aluminum, so I need advice on what kind of washer or tightening procedure might be best. Is the action of the little gear switching chain somehow loosening the nut that it runs through???