Hi all: Thanks for your comments and suggestions. Much appreciated!
The derailleur I installed at first yesterday was designed for triples, and really wants to shove the chain UNDER the big ring when upshifting (into one of those five gaps). So this morning, just before the ride, I installed a brand new Dura Ace 10-spd front derailleur designed for doubles. It has basically flat cage plates on it (as did the Suntour Superbe Pro this bike used to have). The shifting is OK, but it takes a lot of trimming to keep it from rubbing on one side or another as the chain works its way across the cassette. But the real issue is that now, on some downshifts from the big to small ring, the chain will ride on top of the small ring's teeth, instead of engaging the teeth. It's almost like the chain "expects" the small ring to be closer to the big ring. This isn't the first time I've seen or encountered this problem. Previously I asked the crank seller (V-O) about this situation, but was told they'd never heard of it. But I believe I have seen reference to "9- and 10-speed spacers/ washers" for these cranks, I think at the Rene Herse site. It would make sense that a narrower chain would need its chainrings closer together than a 6/7/8-speed chain. Does anybody have any knowledge of such spacers / issues? Here's a blog report from today with photos, plus my review of the Garmin 310xt GPS watch / computer / thingamajig, including a link to the Garmin Connect page about the ride with map, elevation profile and much more: http://www.xo-1.org/2010/06/rough-riding-north-eastern-san-diego_19.html Yours in sport, Chris Kostman La Jolla, CA http://www.adventurecorps.com http://www.the508.com http://www.XO-1.org -- 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-bu...@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.
