For a few days now I have a short “clamping” vo.re.+vo.li. when I drive with the respective bike over a pothole or a unevenness on the road. At first (also here in the forum) was typed on crossbars or coupling bar. Both were now completely changed on both sides, but the “clamping” was still there. Today then master of the works carried out cause research and also found the cause. I had brake discs and coverings in another work about 3 months ago. That’s what the “painting” comes from, because the brake pads have minimal play and, at the appropriate load, “beat” them against the caliper, which causes this sound. You have to come to that first. Well, I have now complained about this in the corresponding works and see what happens. I had an appointment there on Tuesday. Oh yes, crossbars and coupling rods were “finished”, so I did not invest any unnecessary money.