Originally Posted by
puppypilgrim
Chain derailments caused by the chain bouncing when going over train tracks is now a thing of the past. This is a problem unique to multispeed bikes which do not run a front derailleur.
There are many remedies to your problem....Did you try shortening the chain? Did you use a ramp-less chainring? short cage RD? bash guard? how about a Chain guide? It sounds like you didnt fine tune your 1x9 and wrote it off as an inherent problem with all 1X9's