I snapped my rear derailleur hanger yesterday on a ride and I wanted to know how might this have happedned and if so how can I prevent doing it in the future, I believe I was in the wrong gear going up a hill then I turned round to go down and changed through a few gears at once and when I started to pedal I heard a big snap and my chain had snapped and my rear mech hanger too.
As well as that how do I find the right replacement mech hanger for my bike, a Felt Z95 with a 12-30 cassette? Also How can I check my chain for damage, is it ok to rejoin it and use it again or would I end up making it too short or something like that? Thanks for an answers.