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Rear derailleur identification

By Pete B - Posted on 20 October 2014

NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.

My rear der is getting ready for replacement but I'm not sure how to identify the exact model I need.

The current der has RD M780 stamped on it but when I go on the Shimano website there are various other letters/models available.

I run a 3x10 setup so presume I need a mid cage and I'd like one with a clutch to reduce chain slap.

Any help would be gratefully appreciated, thanks.


Shimano XT M786 10 Speed Shadow+ Rear Mech SGS (and you get a choice of black or silver!!)

have a current model XTR shadow+ long cage - used but in v good condition.

pm me if u are interested.

Confirming what xmas said, you will need a long cage.

something like this

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Best Mountain Bike