10s Deore rear derailleur has a chain guide tab on the cage plate which rubs on the chain when in the largest sprocket. Is this really how it’s supposed to be? I understand keeping tension on the chain but I don’t understand this one.
by CarterJolley
12 Comments
You’ve routed your chain the wrong side of it
no, the chain goes on the otherside of the tab. very very common mistake, i’ve done it quite a few times myself
now why shimano RD have that tab? I dont know
Unscrew the bottom jockey wheels, and you should be able to get the chain on the correct side. You will need to tighten both jockey wheels after.
Thank you, sometimes it’s so simple you feel like an idiot
I found out that if you leave it like that, the tab will come off eventually and you will never route the chain wrong again.
Basically everyone fucks that up at one point or another, and those who claim they don’t are probably lying 🙂
The last time I installed a new chain i rode about 3 hours before figuring out why my drivetrain was making so much noise. It was this.
Adjacent question as we’ve all done this wrong at some point – what’s the tab for??
I don’t ever remember breaking my chain on my MTB and it was like this, routed incorrectly.
Chain is on the wrong side of that tab. I’d call it a rookie mistake except I’ve been working on bikes for 20 years and still do that sometimes.
Not gonna lie I still somehow manage to do this nearly every time💀
I just invert the derailleur. It seems neater.