Sometimes, yes. Often, good tubing has a nice, high-pitched ping when you hit it. But sometimes it does not. So, its not a good test at all, I would say. But it is fun when a beloved bike of yours makes a pretty ringing tone.
jim
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Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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SB forever