Originally Posted by
big john
A lady in our club has a top tube mounted bag and whatever is in there slaps down hard on the top tube when she crosses a bump. Like startlingly loud, like a frame breaking might sound. I tried to warn her that it could be bad but it's her bike.
When I got the Litespeed, every so often when I hit a sharp bump, there'd be a sound like a bell. Then I rode over some really badly patched pavement, and it sounded like a pinball machine. That's why I named that bike "Wizard" as in Pinball Wizard.
It turned out the flange on the handle of the Zefal frame pump was striking the top tube, and Titanium rings like a bell. I now have a bit of foam I stick between the pump and the top tube.