Shimano specifications for rear derailleur hangers from http://www.peterverdone.com/:
<https://lh3.googleusercontent.com/-DdP5EPg--p4/VheHoQYMJCI/AAAAAAAAEI0/u73i9ALcU4s/s1600/Screen%2BShot%2B2015-10-09%2Bat%2B5.22.15%2BAM.png> Moving the axle position forward may solve some problems of these specifications but take from your max tire size. Shimano's recs put things in place to work as produced, this is a frame builder's reference guide. Another nice online resource is Barnett's, applicable section available at https://www.bbinstitute.com/dl/dx_demo_chapter_32.pdf Some sage troubleshooting there, including diagrams if you scroll way down. Andy Cheatham Pittsburgh On Thursday, October 8, 2015 at 9:44:19 PM UTC-4, comveo wrote: > > Hey all, > > I'm a bit curious about an issue I've been having recently on a bike of > mine. > I'm getting skipping in most gears under load. The skip takes place > without dropping to a higher gear. Similar to symptoms of drivetrain > components being worn > > All parts are new and were installed at the same time. > > -Paul Jono hub spaced to 135mm, frame re-spaced to match. > -Epoch 8 speed freewheel 11-32 > -Sram PC870 chain > -Raceface narrow-wide 44t chainring > -Ultegra 8sp rear shifter. > > So it's a 1x8 setup at the moment. > > The chainline is technically off by about 3 millimeters where the BB could > stand to be slightly longer. > > I also could absolutely be using a short cage RD, but didn't have one on > hand. > > I have the largest tire possible installed, and thus need to back the rear > axle completely into the dropouts. > > In doing this, 2 things become evident. First of all, I can't get the > B-tension to swing the upper pulley close enough to the largest cog. I took > it out completely and I'm still far from my goal. Also, as the axle is so > far back, there is so much wrap that the RD hanger mounting point sits > forward of the axle by a decent margin. > > Am I just pushing the limits of where the rear wheel was designed to sit > in the bike with a geared setup? > > If it's merely a matter of having to choose a smaller tire to have the > axle in a more central/forward position in the dropouts, that's a bummer > but I'll manage (I'm fitting 40mm Celement X'Plors in a Univega frame with > this setup) > > Photo attached. Any ideas are greatly appreciated! > > > Thanks everyone : ) > > -Bryan > -- 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/d/optout.
