Thread: Physics problem
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Old 07-09-15 | 03:08 PM
  #35  
nlerner
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Originally Posted by Velognome
But seriously, no one believes you'd ride more than a few hundred feet with a rub or a click, just impossible.
You know, you're right. I hate extraneous noises. But for some reason, I didn't notice this one on a previous ride--or maybe I forgot, that's a problem when you have too many bikes. And my question is really about what I should do at the moment once discovering the problem. I wasn't going to go to the nearest house and ask if they have any Pre-CPSC Campagnolo front derailleurs. I was going to keep riding, having to make such a difficult choice.

Originally Posted by noglider
It might depend on how hard you ride. If you ride hard, the chain rubbing against the derailleur could cause a greater loss of energy than the banging of the crank against the derailleur. The friction from the chain rubbing is likely to increase as your effort increases. On the other hand, the crank bangs the derailleur when you're applying more power to the opposite crank, so the crank banging the derailleur is probably not banging it hard. And that force decreases as your pedaling effort increases.

So if you're tooling around, let the chain rub. If you're mashing hard, let the crank bang.
Um, yeah, twss.

Originally Posted by The Golden Boy
32.
I think we have a winner.
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