Originally Posted by FBinNY

If you've read Dabac's posts in the past, you'd know that he's not in any way an internet dickhead. His post was a sincere attempt to point the OP to a source that might help him understand derailleur systems in general, and his problem in particular.

+1



Part if the problem is that the OP is describing an impossible situation wherein the chain changes sprockets, yet the ratio doesn't change. Also his vague understanding of multiple chainrings & front derailleurs reinforces Dabac's conclusion.

There's nothing wrong with being a newbie, and we all want to help, but often the best help we can offer is to point someone to a published source that will give a good general background, so he can pinpoint and better describe the problem, if not solve it himself.

For my part, I don't think there's anything wrong with the bike, just that the OP was never taught how to use his gear system effectively.