Jason: I was having some weird, unintended shifting issues a while back and someone on the list suggested looking at the RD pulleys. Specifically, if your rear derailer is intended for indexing, the upper pulley may be floating, i.e., have a lot of free play. My problem went away when I swapped the upper & lower pulleys. This is Shimano cassette & RD, with Suntour BarCon friction shifters. If your RD is fairly new, this is probably a long shot.
dougP On Oct 29, 7:15 am, jandrews_nyc <jasonaschwa...@gmail.com> wrote: > Hi > After reading with interest the previous post about going down in the > number of sprockets from 9 to 8 to 7, I decided to post and share what > I've been dealing with. > First of all, I have a 8 speed Hillborne with Silver shifters built up > by Riv that shifts perfectly...pretty much all the time. > > About 6 months ago, I purchased off this list a used Bleriot frameset > and have slowly been building it up on a budget. I'm finally done but > am having some shifting issues. By the way, this is the first bike I > ever completely built up all the way from installing headset and BB to > adjusting derailleurs, etc. So it was a great learning experience. > > It's built up as an old man townie 14 speed with the VO wide range > compact double crankset....the one that's the TA ripoff. > I used a budget Shimano 7 speed cassette with the appropriate 4.5mm > spacer for the current Deore rear hub. > I am using some vintage Suntour handlebar thumbshifters that I > purchased NOS about 2 years ago and used on another bike..so they have > plenty of life left in them. The crankset is 46T / 30T and the 7 > speed cassette is 13-28. > Initially I planned on using the Index setting for the shifters as > they are "7 speed", but I could never get accurate shits. I did speak > to one mechanic who said Suntours of that era never shifted well and > that's what brought them down. I don't know if I believe that. > So, since I normally ride friction, I've been content to do that. > but... > The bike slips out of gear often enough to make me think there is some > problem. Usually its in third largest cog on the cassette. and the > second smallest. I do have to do a decent amount of trimming when in > the large chainring which is what I'm in 85% of the time. > The little 30T front chainring is reserved for climbing. > > Also one more thing...The VO crank and the recommended 118 BB didn't > work initially on the Bleriot. The crankarms would hit the chainstays > so I used another very long BB that I had. It's 127.5! I think the > ideal BB spindle length for this combo would be 122-ish. > I don't know if that is contributing to the shifting slipping, but it > seems to inconsequential to me when I'm riding because that crankset > is so low-Q to begin with. > > Any suggestions? I am thinking of maybe taking one more link out of > the chain. > > Photos below: > > http://gallery.me.com/jasonaschwartz#100082 > > Thanks, > Jason -- 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.
