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  • Low profile reduces weight and increases the likelihood of passing though tight passages unscathed
  • Single tension design keeps derailleur from hitting chainstay on bumpy trails and results in a smooth, quiet ride
  • Eleven-tooth pulleys run quiet and wear long due to alternating tooth contact between inner and outer chain plate
  • Direct chain routing reduces chances of a snag
  • High-tension return spring increases sensation of crisp shifting


  • Save 10%! This item qualifies for our drivetrain bike part discount. See Details

View all Shimano Rear Derailleurs

REI membership


Best Use Mountain Biking
Derailleur Type Rear
Cage Length Medium / Long Cage
Max Rear Cog Size 35T / 45T
Speeds 9-speed
Weight 239 grams
Rated 4 out of 5 by from Lightweight but shifting is not perfect I bought the XT M772 Rear Derailleur to replace 6 years old Shimano XT RD-M750 because I was having issue with shifting and having chain sucks. I tried cleaning and grease the old Rear Derailleur but it is just a temporary solutions. I decided to purchase the new XT M772 Rear Derailleur with the REI member 20% discount. The Rear Derailleur is very sleek, nice looking and solve my chain suck issue. I have been using it for almost a week but I am not 100% happy with the shifting. I still find it very noisy when shifting down. I felt so much friction for new derailleur and not smooth during shifting. I am not sure if the installation was not very good (Installed by REI technician) or faulty product. I need to bring it back to REI to get it tune again or some adjustment.
Date published: 2012-10-17
Rated 5 out of 5 by from Great Derailleur Shifting without delay and precision is important to me and this deraillure does it well.
Date published: 2007-11-07
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I notice that this derailleur doesn't have a cable tension adjuster, how will I adjust the indexing?

Asked by: Melvyng
To adjust the trim adjustment, you will need to rely on the barrel adjuster from your shifter.
Answered by: REIservice
Date published: 2017-04-04
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