I have a Mongoose Blackcomb which is completely stock. I am considering updating my RD from a Shimano Altus to a Deore XT. Is there anything I need to know about compatibility, such as will it work with my 8speed cassette, or should it fit? And is it worth having a bike shop install the new derailleur? Thnx in advance.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: New Rear Derailleur