This video is pointless. You haven't given any information on the cause of failure. It should be examined by a mechanic and then maybe you can put the blame on SRAM.
A sane viewer would trust the engineers in SRAM more than some guy posting such a video. Again, your post is pointless.
I've bought a bike about 2 years ago which came with this mech. I cycling 2 times every month for about 3 hours. The mech got loose at the pivots, so it did not align up properly the chain at all positions. So I've decided to replace it. Obviously the brand new one was too stiff, and even a verly slight grit or temperature changed could have caused it to get stuck in the uppermost position.
@francisc0 I understand you like discussing with people & gaining knowledge for your self..But in here there's a saying " a real knowledge has to be stolen" roughly translated..That means..go to a mechanic and just absorb what you see.."Steal" a knowledge from him..Like this you are getting in more of dubiosus..Especially cause of many different opinions..Sorry for a crappy English.
The design of this mech produces very low torque when it is fully extended. The Shimanos XT mech which has 1 rotation axle at the top and 2 at the bottom (triangle) vs 2-2 (parallelogram) on the sram produces much more torque when u are on the biggest sprocket.
Everyone can trust whoever they want, I trust physics and mathematics.
I have M.Sc. degree in engineering, and I've posted this video to share my "bad experience"
Sorry francisc0, I thought you were just an unhappy user with no insight on the subject.
I think you can find which point causes the stress on the movement of the derailleur more easily if you remove the spring on the mechanism first. If it is some kind of dirt stuck in the wrong place, maybe it can be fixed. I have never used an X9 but for almost 5 years I'm using an X7. I broke one and got another one last year. It always worked flawlessly on my 8 gear setup.
maintenance brohan iv had the same mech on my norco for years and still shifts smoothly. it only takes a few minutes to brush off the mech and lube it after every ride.
It just needs some lube in the pivots. All the joints in the pivots are metal on metal, no lube and even 1 hours worth of thrown up dirt will make it stick.
@Thespyykker SRAM derailleurs don't have a b tension screw. The only other bolts are the cable anchor bolt and the limits screws. Limit screws control how far up or down the der. can move. The anchor bolt.... well anchors the cable.....
It was perfectly clean. It's obviously not what you would expect from a brand new mech. The original one which came with the bike didn't last 1 year, and it wore out at the bolts. I got it replaced by a Shimano XT.
in my experience, cable housing has a little something to do with it.
mockys2007 3 months ago
@mockys2007 That's exactly what I said when I first saw this.
ilikabika 1 month ago
REPLACE CABLE! OIL SPRING SIMPLES!
CORRIEJGREEN 3 months ago
This video is pointless. You haven't given any information on the cause of failure. It should be examined by a mechanic and then maybe you can put the blame on SRAM.
A sane viewer would trust the engineers in SRAM more than some guy posting such a video. Again, your post is pointless.
kerembasaran 4 months ago
@kerembasaran
Just to see the whole picture:
I've bought a bike about 2 years ago which came with this mech. I cycling 2 times every month for about 3 hours. The mech got loose at the pivots, so it did not align up properly the chain at all positions. So I've decided to replace it. Obviously the brand new one was too stiff, and even a verly slight grit or temperature changed could have caused it to get stuck in the uppermost position.
francisc0 3 months ago
@francisc0 I understand you like discussing with people & gaining knowledge for your self..But in here there's a saying " a real knowledge has to be stolen" roughly translated..That means..go to a mechanic and just absorb what you see.."Steal" a knowledge from him..Like this you are getting in more of dubiosus..Especially cause of many different opinions..Sorry for a crappy English.
MeeowsyMcDermott 1 month ago
@MeeowsyMcDermott Btw it looks that somethings wrong with a spring in a derailleur..That movement doesn't look quite normal...
MeeowsyMcDermott 1 month ago
The design of this mech produces very low torque when it is fully extended. The Shimanos XT mech which has 1 rotation axle at the top and 2 at the bottom (triangle) vs 2-2 (parallelogram) on the sram produces much more torque when u are on the biggest sprocket.
Everyone can trust whoever they want, I trust physics and mathematics.
I have M.Sc. degree in engineering, and I've posted this video to share my "bad experience"
Thanks for your comment.
francisc0 3 months ago
Sorry francisc0, I thought you were just an unhappy user with no insight on the subject.
I think you can find which point causes the stress on the movement of the derailleur more easily if you remove the spring on the mechanism first. If it is some kind of dirt stuck in the wrong place, maybe it can be fixed. I have never used an X9 but for almost 5 years I'm using an X7. I broke one and got another one last year. It always worked flawlessly on my 8 gear setup.
kerembasaran 3 months ago
Did you clean it after this one hour ride? If so, you may have removed the lube.
eshneto 5 months ago
maintenance brohan iv had the same mech on my norco for years and still shifts smoothly. it only takes a few minutes to brush off the mech and lube it after every ride.
WhiteGravey 6 months ago
It just needs some lube in the pivots. All the joints in the pivots are metal on metal, no lube and even 1 hours worth of thrown up dirt will make it stick.
deadeyeduck 8 months ago
one of the smaller bolt on the derallier ajusts the tension and also the upper and lower bounries if you try and change them abit it may help.
Thespyykker 10 months ago
@Thespyykker hes maybe that's it
kananisA75 10 months ago
@Thespyykker SRAM derailleurs don't have a b tension screw. The only other bolts are the cable anchor bolt and the limits screws. Limit screws control how far up or down the der. can move. The anchor bolt.... well anchors the cable.....
ilikabika 1 month ago
it just need some oil in the bolts and the rotors and a good cleaning
kananisA75 10 months ago
It was perfectly clean. It's obviously not what you would expect from a brand new mech. The original one which came with the bike didn't last 1 year, and it wore out at the bolts. I got it replaced by a Shimano XT.
francisc0 10 months ago
@kananisA75 NEVER PUT OIL ON YOUR ROTORS!
RichardWenborn 7 months ago
@RichardWenborn I think (and hope) they meant jockey pulleys.
ilikabika 1 month ago