SRAM X9 10-Speed Rear Derailleur

3.75/5 (203 Reviews)
MSRP : $129.00


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Product Description

You're rolling over boulders like a tank. You line up to take on a sketchy steep climb, give it a burst of power, and then realize your chain isn't connected to the drivetrain anymore. You lurch to an abrupt stop, boil over into a rage, and consider the merits of hucking your bike, riderless, down the hillside into oblivion. The SRAM X9 Type 2 Rear Derailleur helps prevent dropped chains and limits chain slap by incorporating a clutch mechanism that controls chain tension and stabilizes the rear derailleur cage. Shimano's Shadow Plus design, which is engineered to produce a similar chain-stabilizing effect, preceded SRAM's Type 2 design in reaching the marketplace. However, Type 2 technology differs from its competition in a key way. Rather than opting for an adjustable friction band, SRAM put a Roller Bearing Clutch in their Type 2 derailleurs. The clutch comes pre-set from the factory to provide a certain amount of friction inside the derailleur cage pivot. This friction keeps the cage from bouncing up and down over rocky trails and de-tensioning the chain. Because it's pre-set at the factory, SRAM's Type 2 clutch can't be disengaged or adjusted like Shimano's Shadow Plus mechanism. That being said, the Type 2 clutch is self-lubricating, and there are no external moving parts, so unlike the Shadow Plus system, it's designed to be maintenance-free. The Type 2 mechanism adds about 30 grams to the weight of a standard X9 rear derailleur. A unique feature of the Type 2 system is that its Cage Lock technology allows you, with the push of a button, to lock the derailleur cage in an extended position. While it may not be a game changer, this is a nice feature that allows for easier-than-ever rear wheel installation. There's no need to worry if you accidentally leave the derailleur cage locked; it will return to normal operating position when you hit your first bump.


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Reviews 1 - 15 (203 Reviews Total) | Next 15

User Reviews

Overall Rating:1
Value Rating:1
Submitted by Whitney

Date Reviewed: March 28, 2014

Strengths:    um... it worked ok for a few months

Weaknesses:    i've broken 2 within the last year, just by going off moderate drops. this time, it blew up and took out a spoke. not exactly an easy fix when out on the trail. I still have the same xt derailed on my old bike - 8 years with no problems, so I'm pretty sure it's the disaster, not me...

Bottom Line:   
do not buy this derailleur!

Overall Rating:1
Value Rating:1
Submitted by abzillah

Date Reviewed: September 28, 2013

Strengths:    Locks out so the wheel can come off really easily.

Weaknesses:    1] About every 50 miles breaks shifter cable at the dereileur.
2] Will not shift back down from the tallest gear
3] Will not shift smoothly to all 10 cogs
4] Deraileur hits spokes


Bottom Line:   
Don't waste your time on this deraileur. I am on my second set and these things are just crap.

Overall Rating:2
Value Rating:2
Submitted by knotzykiller a All Mountain Rider

Date Reviewed: July 11, 2013

Strengths:    Crisp shifting if B tension is set so top derailleur cog is 6mm from Cassette

Weaknesses:    Plastic cage (pulley wheel arms) on some years, not sure how that works or when it was changed....

Bottom Line:   
I gave 2 chills for the plastic pulley arms, I had a long cage X9 and brushed a log lightly and it snapped like a dry twig. Replaced with a X7 medium cage that also has plastic pulley wheel arms (cage)
Friend of mine has X9 medium cage with aluminum cage (pulley wheel arms) so not sure why or what years are aluminum..

As for shifting, adjust the B tension so the top derailleur cog or ( pulley wheel) is 6mm from the cassette and all is good. It states to do so in the scram tech sheet so no big secret just kept under tight lips so bike shops can get you to upgrade and spend more money....
Adjust your own B tension and save your cash while you learn something :]

After it`s setup the shifting is crisp and on target, sometimes for no rhym or reason I hear it haunting me for a quick second or 2 but no jumping or ghosting around after PROPER setup.

Expand full review >>

Similar Products Used:   Sram XO 9 speed derailleur
Shimano 10 speed derailleur



Overall Rating:5
Value Rating:5
Submitted by down2ride a Cross Country Rider

Date Reviewed: October 28, 2012

Strengths:    Clean crisp shifting, feels very solid, almost completely eliminates chain slap, great price

Weaknesses:    None, so far

Bottom Line:   
I'm switching from the XT Shadow (for reference). Today was my first ride and I'm already in love. I HATE CHAIN SLAP and this derailleur virtually eliminates it! It is so nice to go over rocks, roots, and drops and not hear that god awful slap. I was very pleased with how clean, crisp, and quick the shifting was. I was afraid with this new technology that it would compromise the shifting, but I didn't find that to be true. Only time will tell how well it holds up, but it feels very strong and durable.

Expand full review >>

Duration Product Used:   1 day

Price Paid:    $110.00

Purchased At:   Aggieland Cycling

Bike Setup:   2012 Specialized Carve Expert

Overall Rating:5
Value Rating:4
Submitted by Pearmund

Date Reviewed: October 14, 2012

Strengths:    Great shifting, very smooth and a big step up from my old 9 speed X0

Weaknesses:    Still get a bit of chain slip on heavy landings

Bottom Line:   
Upgraded (or possibly down graded) from X0 9 speed to a type 2 X9 10 speed. Massive improvement in shifting, very smooth ride, and with less give in the chain, it feels like you get more power down, especially on climbs. The mech is new, so no issues yet, but will definitely keep an eye on reliability.

Overall Rating:4
Value Rating:4
Submitted by junior1210 a Weekend Warrior

Date Reviewed: October 12, 2012

Strengths:    Easy to set up and adjust, can handle abuse, reasonably priced

Weaknesses:    none to speak of yet

Bottom Line:   
This came stock on my MTB and has been an excellent piece of hardware. It has taken all I've thrown at it and come through fine. Adjustment screws are well placed for dialing in and wheels have been easy to keep clean as well.

Expand full review >>

Duration Product Used:   9 months

Purchased At:   came stock on my bik


Overall Rating:2
Value Rating:3
Submitted by MJ a All Mountain Rider

Date Reviewed: October 3, 2012

Strengths:    The cage lock off button to allow you to remove your wheel easily is a great development.

Weaknesses:    I've ridden for 18 years and never had a rear derailleur failure. After 1 month with the x9 type 2 it was hit by a stick ( a good stick I should say) and the cage came out looking like a pair of old cowboys legs. To it's defense it did hold together to get me home, but now I'm up for a whole new unit. Ultimately it was a rider error.. but my issue is with part replacement cost.

Bottom Line:   
I know I should have ridden better and missed the stick, but it was either the stick or off the side of the track and into the bush. If a cage can be bent, it should be designed for easy removal & repair. The replacement cage kit is only about $20 cheaper than a full derailleur.... that's not very eco friendly.


Expand full review >>

Bike Setup:   Trance 29er 1

Overall Rating:5
Value Rating:5
Submitted by jonshonda

Date Reviewed: September 20, 2012

Strengths:    Crisp Shifting, never had an issue.

Weaknesses:    none

Bottom Line:   
Been riding with this for 400 miles without issue. Adjusts easy, never had an issue shifting. I think the shifting is fast and easy, never compared to shimano. I bought another for my Fatbike.

Overall Rating:1
Value Rating:1
Submitted by russ parker

Date Reviewed: July 3, 2012

Strengths:    Can't seem to find any. Had problems with this derailure from day 1.

Weaknesses:    Tension spring. Will leave you stranded. In 25 years riding mountain bikes I've never had a Shimano deraileur. X9 has twice in a year.

Bottom Line:   
As others have said. Problem with the tension spring. Doesn't break, instead it pulls out of the catch. This happened to me without any cause. Not crash, to hitting anything,,,,nothing??? This happened the first time on Monarch Crest trail at 10,000-12,000ft. Had to free wheel 15 miles or so.

Took to bike shop and they re-tensioned the spring and thought problem was cured. Rode 2 more times before it broke for a second time. $140 later, I have a second X9. They say you can't convert to shimano??
This item should be re-called!!

Overall Rating:2
Value Rating:2
Submitted by firefighterdirt

Date Reviewed: May 31, 2012

Strengths:    Shifted great for 4 months.

Weaknesses:    spring broke after 4 months.

Bottom Line:   
1 has lasted almost 2 years on 1 bike and the other lasted 4 months. try your luck.

Overall Rating:4
Value Rating:4
Submitted by 29ernb

Date Reviewed: May 6, 2012

Strengths:    shifts nice, light weight,

Weaknesses:    cable routing, jockey wheel look cheap

Bottom Line:   
2011 model, shifts nice, i have had it only for a couple months, no problems

Overall Rating:1
Value Rating:2
Submitted by downhilldamo a All Mountain Rider from Canberra

Date Reviewed: March 21, 2012

Strengths:    Sometimes has Good Shifting

Weaknesses:    Life, Long term Reliability, Shifting,

Bottom Line:   
As soon as i started using this Product it was ok, then after about 3 months in just starts to skip gears, shift when your don't won't it to, the jockey wear out to quickly. I then took it to my LBS and it was still skipping gears

Expand full review >>

Favorite Trail:   Heartbreaker

Duration Product Used:   1 Year

Similar Products Used:   Shimano XTR Shadow Plus

Bike Setup:   Felt Q820 with new XT brakes

Overall Rating:1
Value Rating:1
Submitted by beau22aus a Weekend Warrior from Australia

Date Reviewed: January 8, 2012

Strengths:    looks nice

Weaknesses:    Lasted 10 whole minutes. Had professionally installed with compatible components. After 10 minutes of VERY LIGHT shifting (on concrete for that matter) the tension spring broke. Luckily it didnt destroy my wheel. Currently seeking replacement from SRAM

Bottom Line:   
What makes me angry is that my shimano derailleur, on my older bike, is still going stong after 12 years!

Expand full review >>

Duration Product Used:   Less than 1 month

Price Paid:    $90.00

Purchased At:   local bike shop

Similar Products Used:   none

Bike Setup:   1x10. sram x9 derailleur and trigger, xt 10 speed cassette, KMC gold/Ti chain.

Overall Rating:5
Value Rating:4
Submitted by Jason a Cross Country Rider from Akeley, MN, USA

Date Reviewed: September 7, 2011

Strengths:    replaceable cam for cable. The old SRAM had it molded as part of the body and cracked. This new design also allows for straighter/shorter cable routing.

Weaknesses:    Older SRAM had screws rather than rivets in its construction. Fine with me though, since it seems less likely to fail and probably is lighter.

Bottom Line:   
Seems very precise except in the very roughest of conditions. As I mentioned above, it appears the cam section (plastic) that the cable rests in, may be replaceable. I'm not sure if parts are available though. The mostly aluminum construction looks much nicer than the older style carbon SRAM derailleur. Easy to adjust. The cage was slighlty larger by about 1/4",

Expand full review >>

Duration Product Used:   3 months

Price Paid:    $40.00

Purchased At:   Amazon

Similar Products Used:   Shimano, SRAM ESP, SRAM Carbon

Bike Setup:   Sachs front derailleur

Overall Rating:1
Value Rating:1
Submitted by Steve a Racer from Wooster, OH

Date Reviewed: September 4, 2011

Strengths:    Shifts well. Light weight. Easy to set up and adjust. Product looks good.

Weaknesses:    Tension spring broke during a climb. The breakage was severe and destroyed the derailieur hanger on a brand new Jamis Dragon. Steel frame so frame is destroyed since the hanger cannot be replaced.

Bottom Line:   
The product should be avoided until Sram fixes the spring. New products often have unexpected problems but a tension spring problem is unacceptable. If you are riding with this product, please replace it as soon as possible so as to avoid possible injury and to protect your bike. I was lucky and was unhurt and only lost a brand new $800 frame.

Expand full review >>

Favorite Trail:   Vulture's Knob

Duration Product Used:   3 months

Similar Products Used:   Other Sram and shamano products. I had very good luck with other Sram products.

Bike Setup:   Stock Jamis Dragon 29. Jamis bikes are amazing and it is a shame Sram's product destroyed a new bike.

Reviews 1 - 15 (203 Reviews Total) | Next 15

Review Options:  Sorted by Latest Review | Sort by Best Rating


X9 rear derailleur, difference between '10 and '11?

Having picked up my X0 grip shifters, I am ready to get the rear derailleur. I can't really tell that there are any real differences between the 2010 X9 and the 2011 X9. I was going to get the 10 X0, but the X9 is half the price and I doubt that I will be able to tell ANY real difference.... :) T ... Read More »

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