Had one more crack at the 12sp derailleur on Felix’s 11sp drivetrain earlier in the week. Felix had a cold and Covid test the other day, so it was first chance to test it tonight before KOB.
New inner/outer, new chain with 2 more links (felt it was a tiny bit short last failed attempt), fresh cassette.
Shifts up perfectly, just constantly a little hesitant to drop down on the lower gears. Kids have race tomorrow so I wasn’t prepared to have it not quite right.
Dug the 11sp mech out of the box, set it up, shifting feels perfect in top few gears then deteriorates in lower gears. Also, having to use way too much B screw to get it into the 42t of the new 9-42. Screwed right in, barely clears, shifting atrociously.
Scratches head, fucks around a few more times. It’s just looking all wrong with so much B screw. The 9t is not getting substantial wrap. Felix would destroy that in no time.
Looks again….wait….DEORE? I don’t have any deore 11sp?
In the dim light, I’d grabbed a deore 10sp derailleur, and tried to rush the job. Didn’t even notice. No wonder it didn’t have capacity, and shifting was shite as it moved up cassette.
Found the M8000, fitted, surprise surprise, perfect shifting. It’s probably the best it’s ever shifted now it’s back to a 42t rather than the 46.
Trying to rush turned a 15 minute job into a 90 minute job. I’m a true fuckwit.