Patrick: The shifting ramps on the cassette cogs have nice, crisp edges when new. My theory is that as they wear from use they gradually become less effective at picking up the chain, leading to less reliable shifting. My observation is that the ramps wear well before the cog teeth. At a casual look, the cassette may appear serviceable, with nice symmetric teeth. However, comparing a new cassette with one that's well used it's easy to see the difference in the condition of the ramps. If I were in your situation, I'd take it in to a shop & compare a new cassette to yours. Take a good look for yourself & you'll probably see the difference. Clean up the cassette first to get the best visual.
dougP On Monday, November 11, 2013 4:30:18 AM UTC-8, Deacon Patrick wrote: > > I’m not positive (due to bludgeoned brain, not great memory), but I > believe I experienced this issue when the Hunqapillar was new and I just > chalked it up to figuring out the friction shifting. Sure enough, over > time, the issue faded away, so matched my slow learning curve. Now I wonder > if it went away because of chain stretch. Anyway, here’s what I’m > experiencing now (with a reminder of recent history)… > > New chain and granny chain ring after a very stretched out chain. > > The lower half of the granny gears (I don’t ride the upper half) and lower > 1/3-1/2 of the middle chain ring are smooth as butter. Easy to hit the > gears and no skipping. > > Upper 1/2-2/3rds of the middle chain ring (and likely the top two gears of > the big chain ring, but I rarely ride that and haven’t since chain > replacement) skips when pedaling. It’s not on the edge between gears (I can > back pedal smoothly). My foot just suddenly spins fast, than catches again > (not good for vertigo). > > I have tried: 1) fine adjustment with gear shifter, no difference; 2) > tightening the shifter hand nut, no difference. > > Ideas: 1) bent derailleur?; 2) rear cassette needs replacement (this > doesn’t make sense to me since it is only the higher gears and it’s the > lower gears that get the most use and torque); 3) ??? > > Any ideas? > > With abandon, > Patrick > > *www.MindYourHeadCoop.org <http://www.MindYourHeadCoop.org>* > *www.OurHolyConception.org <http://www.OurHolyConception.org>* > > -- 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 [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/groups/opt_out.
