So I was riding today and my rear derailleur started dropping in gear so I figured it just needed to be adjusted, before I could pull over it tore off and wedged into the spokes of my back tire.
I would like to know what caused this? I think the derailleur jammed, but I can spin both the idler and jockey easily and all springs are good. Possibly caused by the chain?
Two spokes need to be replaced
New derailleur cable and housing
New rear derailleur mount
Possibly new rear derailleur
New idler pulley (current one is cracked)