Bent derailleur hangar can put the bottom cog quite close to the spokes, doesn’t take much encouragement from there for the chain or mech to get caught in-between moving spokes.
Schwen031 on
I guess the chain fell of the largest cog, got caught in the spokes and because of the wheel turning forward it pulled the derailleur upwards in the direction of the wheel turning?
dafjkh on
Wrong limits set, issues with the freewheel, backpaddeling, wrong indexing, broken chain…
l008com on
Any time its happened to me, its because the derailer hit a spoke, but the wheel kept on spinning, and the derailer went bye bye.
Although it happened once while I was doing a high speed downhill stretch and when I was going over a bunch of rocks, the derailer went into the spokes and snapped half the spokes on the wheel and locked up the wheel. So I was left skidding to a stop down the hill. The spoke snapping was SO loud, everybody around came walking over because it was such a violent noise.
Mission_Possible_322 on
It looks like your derailleur cage caught a spoke while the wheel was spinning…that happens when the derailleur adjustment screw for the low gear didn’t limit the derailleur enough, likely from a misadjusted derailleur..the derailleur went too far and the cage caught a spoke..and the wheel spin, then pulled the derailleur up forcefully.
Mundane-Income777 on
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Additional pictures came in. Not sure if this would change the consensus, which is either bent hanger or mistuned limit screw caused it to get caught by the rear wheel spokes.
Thank you guys
6 Comments
Bent derailleur hangar can put the bottom cog quite close to the spokes, doesn’t take much encouragement from there for the chain or mech to get caught in-between moving spokes.
I guess the chain fell of the largest cog, got caught in the spokes and because of the wheel turning forward it pulled the derailleur upwards in the direction of the wheel turning?
Wrong limits set, issues with the freewheel, backpaddeling, wrong indexing, broken chain…
Any time its happened to me, its because the derailer hit a spoke, but the wheel kept on spinning, and the derailer went bye bye.
Although it happened once while I was doing a high speed downhill stretch and when I was going over a bunch of rocks, the derailer went into the spokes and snapped half the spokes on the wheel and locked up the wheel. So I was left skidding to a stop down the hill. The spoke snapping was SO loud, everybody around came walking over because it was such a violent noise.
It looks like your derailleur cage caught a spoke while the wheel was spinning…that happens when the derailleur adjustment screw for the low gear didn’t limit the derailleur enough, likely from a misadjusted derailleur..the derailleur went too far and the cage caught a spoke..and the wheel spin, then pulled the derailleur up forcefully.
*
Additional pictures came in. Not sure if this would change the consensus, which is either bent hanger or mistuned limit screw caused it to get caught by the rear wheel spokes.
Thank you guys