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Could a bent derailleur hanger cause it plough into the cassette - Does it index through 11 steps if taken off the bike?
iamalex-
Nope. I've managed to make it go to six by backing the adjuster screws right off, but then it hits the buffers and won't shift further. The real problem seems to be that when it thinks it's in the correct position for the smallest cog on the cassette, it's actually about halfway through the cassette.
Brommers
Anyone had an issue with a Di2 rear mech not being able to get all the gears it should? @Cycliste stacked it on Sunday's club ride, and while her bike was lying on the ground another rider rode over the rear wheel. The rear mech has obviously taken this rather badly, as it now only has 5 working gear positions. It's almost as if it thinks it's in the highest gear position (smallest cog on the cassette) when it's physically halfway through its travel,and then gets stuck when it gets to position 5 because it's up against the bump stop.
Any advice? Other than buy a new rear mech, which is my current plan.