The rhythmic noise sounds like the chain barely grazing the front derailer, like what would happen if the chainring is ever so slightly out of round. In this scenario you could think you have the cage centered over the chain, then not notice the chain wobbling over to graze the cage while pedaling. This issue can be exacerbated by using a 9-speed (wider) chain with a 10-speed (narrower) derailer, which I suspect is the case on your bike.
The other sound? No idea! 🤷 On Saturday, April 24, 2021 at 3:14:36 PM UTC-7 Bicycle Belle Ding Ding! wrote: > Oh, it’s not your fault, Ben. I am overly attached to this bike and I’ve > made myself a wreck over it. > > As far as the noise, there is more than one. But there is one noise that > sounds kind of like electrical current, and it never came at a predicable > time - like with pedaling. It would cause a little vibratory feeling and > was loud enough that I could pick it up using my iPhone to video. Last > night it was nearly constant and seemed to coincide with the turning of the > pedals. I caught it on video, which I will attach here. There are actually > two sounds being made, I think one is drivetrain chatter that I’m hoping > the shop sets straight for me this week. You have to tune your ear to it > but if you listen you’ll hear two atypical sounds - sort out the wind noise > and listen for a rhythmic sound and a constant chatter. They’re there. > > The sound when the wheel is spun with the bike stationary is slight, but > annoying. I don’t have that on video and the bike is now in custody of the > shop. But if Shutter Precision managed to make it quiet, why can’t Schmidt > do the same? And the flickering. That occurs at speeds that I think are > fast enough to generate a solid light. At the same speed a SP will hold a > steady beam. I know SON is the reigning champion for dyno, but why? > > Here are the videos. The first is a better specimen, I think: > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rbw-owners-bunch/04cd26c0-c2f4-4ea0-9214-440740ecd178n%40googlegroups.com.
