On Sat, 2009-04-04 at 16:57 -0700, Crank wrote: > I have an Atlantis 61cm that has ghost shifted on me continuosly until > I modified my cassette. I went from a Shimano 9 speed to an IRD 8 > speed, but kept the 9 speed chain. Wide gap in cassette, narrow chain > gives me lots of room to friction shift. What you may be experiencing > is frame flex, that stretches the cable and creates a shift.
Odds on that are very small, unless the frame in question is something like an aluminum Alan. If the frame is any kind of Rivendell (I no longer recall) it's just flat out impossible. There are many things that can cause ghost shifting, especially when you friction-shift hyperglide cassettes. Occasionally it's the shift lever -- you have to really crank down HARD on the D rings with Silver shifters, far more so than would be conceivable with ordinary friction downtube shifters -- to keep them from slipping. But far more often it's the basic nature of the cassette itself: it wants to shift, it's designed to make that very easy, and if the chain isn't perfectly aligned (indexing can do, but it's very hard to do with a friction shift because you get no clues that alignment isn't precisely, exactly perfect) it'll shift under load. Widening the gap between sprockets makes accurate friction shifting considerably easier. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
