i just went through this very same issue with my HubbuHubbuH. I had used the exact same derailer and shifter combo on my Cheviot so it was a huge mystery to me what wasn't working. I had friction shifters and swapped them to index, and this helped the most (but it seems like you have this covered). I also unscrewed the B-limit screw as much as I could so the chain would have maximum contact with the cog, if that makes sense. What was so frustrating was the entire drivetrain (save for the jockey wheels on the rear derailer) was brand new. Perhaps part of it was tight links but they seem to have loosened by now. I hope any of this helps. (the B-limit part seems most applicable).
On Monday, July 23, 2018 at 8:37:15 AM UTC-7, Brett Callahan wrote: > > I'm at wit's end and would be grateful for suggestions. > > Setup: My Atlantis is running a rivish setup. 8 speed Shimano Cassette, > 11-32; 8 speed SRAM chain; Shimano Altus rear derailleur; indexed 8 speed > Ultegra bar ends. All parts have been previously used on other bikes I own > without issue. My previous setup on this bike, which relied on friction > thumb shifting, worked without issue. > > The chain is not particularly worn (I don't have calipers, but it has at > most a few hundred miles on it). It does have 6 or so extra links spliced > into it using a second power link in order to accommodate the long chain > stays. The cassette appears to be in ok shape--no shark fins yet. If it > comes down to replacing parts, I'll start there. The derailleur? It's an > Altus--basically bullet proof, right? It's limits are set properly. > > Problem: I experience chain slip when the chain is under load. I cannot > replicate the problem with the bike on a work stand. It's minimal when the > chain is in the center two cogs of the rear cassette, and increases in > higher or lower gears. It is not the chain skipping up or down the cassette > before settling into gear as might happen when missing shifts or with > improper indexing--it feels as though two or three links "skip" across the > top of the cassette periodically. > > Suggestions? I'm not opposed to replacing parts. A new 8 speed chain and > cassette don't cost much these days, but it just seems like they shouldn't > need it yet. I've also considered upgrading the derailleur to a Deore > model. I'd prefer not to change the shifters, which I like. The only reason > I haven't done all that yet is that I'm worried there's a simple solution > I'm missing, and that the problem might remain. > > Any thoughts appreciated. > > Cheers, > > Brett, grumpily and bumpily grinding his gears across PDX. > > -- 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 post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
