My front XT derailleur got caught on the chain the other night, and after repositioning and readjusting it, I notice that I get a clicking noise ever half chain revolution or so from the rear of the bike.
When I turned the bike over I could see the rear derailleur arm (XT) was not aligned with the direction the chain was running in, and so every so often the chain jumped from its guide wheel. It happens with the large front cog and the larger rear cogs selected.
I know little about bike mechanics, but any advice would be useful. I cant tell whether the whole housing is moved, bent , or whether just the arm is bent.
Can anyone point me to some diagrams/pictures that show correct alignment and how it measured ?
My front XT derailleur got caught on the chain the other night, and after repositioning and readjusting it, I notice that I get a clicking noise ever half chain revolution or so from the rear of the bike. When I turned the bike over I could see the rear derailleur arm (XT) was not aligned with the direction the chain was running in, and so every so often the chain jumped from its guide wheel. It happens with the large front cog and the larger rear cogs selected. I know little about bike mechanics, but any advice would be useful. I cant tell whether the whole housing is moved, bent , or whether just the arm is bent. Can anyone point me to some diagrams/pictures that show correct alignment and how it measured ? Any help appreciated Dave
http://www.parktool.com/repair_help/FAQindex.shtml Scroll down to Derailleur and Shifting (front and rear) section. You might have a bent rear derailer and or hanger. Take a close look at your chain rings, as at least one of them sounds like it is bent.
