Originally Posted by
DiegoFrogs
Do the upper seatstays have a drilled bridge? Perhaps you can mount something there that is more resistant to twisting.
This is one reason I prefer fenders that have stays with two legs. I had a pair of factory steel fenders on a Finnish city bike that had only one stay on each side. The bridge mount had a single loose rivet attaching it, so it was free to twist. I replaced with bolts and anti-rotation washers which helped, but still the front would vibrate and twist wildly if I hit a bump or rode over cobblestones with one hand on the bars.
It does have a drilled hole, yes. I considered this, but I’m not the most mechanically adept and the idea of drilling a new hole through the fender scares me. Perhaps I could take it somewhere to have it done properly.