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  • Shimano XT M772-SGS Top Normal Shadow Rear Derailleur
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Shimano Deore XT Shadow Mountain Bicycle Rear Derailleur - RD-M772

by Shimano

Price: $84.98 - $149.99
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  • Low profile for improved durability
  • Low profile design saves RD from damage in a narrow passage.
  • Direct routing reduces the risk of snagging
  • Stronger return spring for more crisp shifting feeling
  • Capacity : GS 33T, SGS 45T

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Frequently Bought Together

Shimano Deore XT Shadow Mountain Bicycle Rear Derailleur - RD-M772 + Shimano CN-HG93 Ultegra/XT 9-Speed Chain
Price for both: $118.28

These items are shipped from and sold by different sellers.

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Product Description

SHIMANO SHADOW RD: low profile design intended for more aggressive riding. Quiet: will not contact chain stay. Super low profile design carries many benefits. Because of its low profile and single tension construction = no hitting chain stay in rough conditions.The result is smooth and silent performance.

Product Details

  • Shipping Information: View shipping rates and policies
  • ASIN: B00OSYDON4
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (43 customer reviews)
  • Amazon Best Sellers Rank: #126,230 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

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Customer Reviews

4.7 out of 5 stars
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Most Helpful Customer Reviews

9 of 9 people found the following review helpful By S. Phelps on March 29, 2008
Size: GS
Got this puppy to replace a stock Shimano Alivio and expected an improvemetnt in performance. What I got was nothing short of a miracle! Once I got this baby tweaked in on the cable adjustment it was on! When upshifing on inclines, I felt like I had an automatic transmission! I couldn't even feel the upshift. Even under full load out of the saddle this derailleur is outstanding. I am amazed at the difference this component has made. My bike feels like a $2000 package! Bravo Shimano!
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7 of 7 people found the following review helpful By J. Morris on May 29, 2009
Size: 9 Speed Verified Purchase
I had to replace my rear derailleur for the first time on my Specialized Stumpjumper. It came with an XTR version of this (2-3 years old now) and the old one got clobbered in a fall (maybe two?). When I went into the store to get a new one I was in sticker shock over the $200 price tag for the XTR. I said no thanks and did some research. The differences between this model and the XTR are minuscule and not worth the extra money. After a few hours of work I had this working and it shifts just as beautifully as my old one. This will be my standard from now on.

Be careful in your selection of the model you are looking for as there are differences for different bikes, different gears, etc. They make them all and you need to get the right model. This is particular one is probably the most common though. You should replace your shifter cable at the same time too. Instructions that came with this are pretty good, but could be a bit better.
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4 of 4 people found the following review helpful By SABjork on March 3, 2011
Size: 9 Speed
I was riding the Shimano RD M770 for a number of years. I really liked the precision shifting with a complimentary Shimano XT Deore parts. One day I was in extreme low gear and cresting a hill when I shifted up and my chain bound with a lower derailluer. This threw my chain into the spokes and twisted my derailluer 180° pointing straight up. Essentially it only broke the hangar stop on the pivot axle. But I replaced the entire derailluer assembly with the 772. What a difference. The 772 has a much stronger spring that enables crisper shifting and quicker response. The "Shadow" series also resides under the rear sprocket instead of outside of it. This means that it is less vulnerable to striking passing the obstacles additionally, the cable makes a straight pull from the lower arm as opposed to and an angled pull which started to fray my shifter cable. Although it does not appear as durable as the 770 it certainly performs far better. And for the price difference of only a few dollars it is a worthy upgrade. I'm very happy once I dialed in the shifter tension. Another nice feature of the "shadow" series is that you can shorten the lower cable housing so you don't have that large loop going into the derailluer. Instead you route the sleeve directly at the derailluer with little slack. This decreases the amount of cable friction from the shifter to the rear assembly. It is noticeable and more precise.
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3 of 3 people found the following review helpful By Amazon Customer on September 1, 2012
Size: GS Verified Purchase
Works like it's supposed to. Excellent value in a higher end derailleur. I don't think there is anything I would change about. If you want something lighter (and more fragile) than spend the cash for XTR.
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1 of 1 people found the following review helpful By Josh-D. S. Davis TOP 1000 REVIEWER on October 26, 2013
Size: 9 Speed Verified Purchase
You can go to the 900 series and get something lighter, or the 800 series to get something you can drive a truck over.

But, if you're upgrading, this is the spot to land. Great take-up spring prevents chain slap or auto-shift on bumpy roads.

Adjustment was: Install, pull cable tight, tighten the cable screw, set the high & low limits.

Poof, that's it. Perfect. Shifting is crisp.

Unless you're racing, there's no need to go past this level, but if you ride more than a few miles a week, it's really worth upgrading to this.

Also, the 792 (shadow) supports 36T rear gears, which is great if you're using a compact crank or single front to scale walls.

It also is closer to the spokes, and stiffer, so you're less likely to catch the take-up arm on obstructions.
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1 of 1 people found the following review helpful By john mcburney on February 2, 2014
Size: GS Verified Purchase
It's a nice derailleur. I'm using it on a 9 speed road bike with an SRAM 12-32 cassette. It indexes with the 105 STI just fine. For some reason even though it is long cage and has really stiff chain tensioning it seems like I get some chain slap in the small cogs. Maybe time to take out another link in the chain. It's a nice new 9 speed STI derailleur. If I could find a NOS Ultegra or Dura-Ace 9 speed might replace it. But I'm grateful it was available
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1 of 1 people found the following review helpful By bclava730 on May 14, 2011
Size: 9 Speed Verified Purchase
Upgraded from the Shimano deore to this Shimano deore XT, and it was a great upgrade! After 8 hard years on the normal deore I couldn't ask for much more out of the springs, this XT was like a night and day difference so precise and immediate, shifts flawlessly even under pressure. Great purchase and price.
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2 of 3 people found the following review helpful By Dako on February 5, 2012
Size: 9 Speed Verified Purchase
I really wanted to like this derailleur, since I have been faithfully riding with Shimano products for over 20 years now. I'm accomplished as far installing and maintaining my own rides, but this rear derailleur is enough to make even the most accomplished wrench throw up his hands in frustration. I can't even complain too much about the lack of a tension adjustment knob, as I have a recent XTR derailleur sans adjustment knob, and I was able to get it set up and running in about 10 minutes. Trying to get this thing dialed in though has been an utter nightmare, and I've finally decided to give up and return it to amazon. It's no exaggeration when I say that 1/8 of a turn on the b-tension in either direction was enough to throw the entire derailleur out of whack and make you have to start all over.

Once the high/low was corrected in accordance with that adjustment, the downshifting then became incredibly sloppy; either double shifting down, or not shifting at all. From a mechanical standpoint, this makes no sense at all. As with all other Shimano derailleurs I've had, a misadjustment makes the same predictable mistake over and over, until it is corrected with tension adjustment, or possible as a worst-case scenario, some H/L adjustment. This thing is just a nightmare though, and I couldn't imagine having to try and adjust it out in the field. I also noticed that the cable makes a sharp and nasty turn right out of the housing, and I can totally see where over short amount of time, this could lead to some major cable wear and breakage. Shimano seems to have over-engineered this thing to the point of ridiculousness. I'm going with a NOS RD-751, because I know it's bombproof, and will give me all the adjustment I need, minus the frustration and headaches.
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