It’s because people pull the dual brifter lever inward while changing gears, eventually shredding enough wires to make the cable snap and leave the cable head firmly lodged in the newly stuck ratchet.
The gear change ratchet is inside the body though? The only thing that can move the cable is the ratchet.
It’s just a bad design where the curve the cable goes through is too tight. Solution is Di2 or R7/8000 or periodic cable inspection/replacement.
Huh, maybe I dreamt it, but you’re right it doesn’t make sense now that I’m trying to picture it in my head. Don’t have a Shimano handy to check.
@grams started
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It’s because people pull the dual brifter lever inward while changing gears, eventually shredding enough wires to make the cable snap and leave the cable head firmly lodged in the newly stuck ratchet.