This is what TH-cam is all about! Talk about perfection. Exactly what I was looking for. Thank you for a wonderful video. Now im of to replace my own jockey wheels and plates!
I was trying to refit my di2 6870 after a cage change late at night. I was going insane because it was just hanging there. One quick watch of your video and I saw how you had to load up the spring, job done, too easy. I just wish I had have watched it before I started 2 hours earlier!! lol
Exactly what I was looking for. Thank you for that detailed overview and excellent explanation that give me the confidence to go make that cage change.
Just what I needed. My di2 wasn’t shifting properly and was really stiff. Stripped it down, cleaned it all up and used the video to put it all back together. Works as new. Well done and thank you so much.
Very helpful, particularly on how to get the spring to tension the cage in the proper direction. Removing the screw so that the cage can swing past was crucial for me when installing the Rockbros OSPS on a Durace derailleur. The instructions provided by Rockbros were poorly explained and written in the worst Chenglish I've ever encountered. Thanks
You’re awesome for sharing this!! I have gone through two rear derailleurs in the last two weeks. What a coincidence. The first one I smashed into my spokes squeezing between two rocks and just yesterday a stick threaded it’s way through my jockey wheels and into the spokes and pulled my derailleur backwards. Ugh!! The horror. No I have a race in 9 days and am scrambling to find another. None on eBay. But I have a old one I can take apart thanks to your video.
After a long time searching, i find a full cage of Dura ace 9070 di2 for me. My original was damaged by a chain cross, with a wrong toutch at the STI. Your video is cool, thank you so much. The Ultegra 6870 looks the same to Dura ace 9070. Thanks bro.
Great video! Remember not to mix up your pulley wheels. The top one is the guide pulley (G-pulley) and the lower one is the tension pulley (T-pulley). They look very similar but on more expensive mechs are different, as they both do different jobs.
thanks for the detailed video. It helps a lot to me. Especially I want to purchase a long cage to be compatible to 11-32T. But Dura-ace doesn't have the long cage spare part available. SO I need to get the RD-6800 GS part to replace with my current SS cage.
additional question, so basically I have a rotor Qrings 52/39 with 11/28 cassette, which mean if I change to 11/32, it needs to have a longer chain? The chain still fresh now btw.
So you will likely need to replace the chain. But go ahead and see if your chain will take the new cassette. You will know that it is so long if your rear derailleur is basically straight.
@@CyclingSatan Thanks mate for the video once again, but I found out the rear end was slightly bent and the gear won't go up further more. So I might need to change my frame now :(
very helpful!! Been having trouble with my rear der not staying adjusted when I go from small to big chain-ring. Was considering replacing the cage but seemed difficult. Now it doesn't.
@@CyclingSatan Sorry, I did not give much for details. You need to buy the inner and the outer separately. Total cost is $30.00 for the M8000 SGS plates. However, as you can buy the complete M8000 SGS derailleur for $61.00, the next time I ordered, I just got the whole derailleur just in case I had previously caused any trauma to the derailleur when I bent the cage plates. When I got it, it appeared to be a genuine Shimano OEM part.
My inner plate doesnt have an allan wrench slot....it is a flat surface. The replacement has a flat surface as well and it seens you have to unwind the entire arm to unscrew...but when u do that the spring begins to unwind out of the slot
This video is gold, thank you a lot! P.S.: by the way, while you're at it and you disassembled the cage, do you suggest any extraordinary maintenance to the rest of the derailleur?
giovanni spinotti, the only other thing you could do is replace the jockey wheels. I replace them every year just because, but other than that you should be good.
Very practical and helpful video. Have you inspected the compatibility of different cages between derailleurs? Do you have to know the exact model of your derailleur to get the right cage model? I'd need to replace a cheap Altus derailleur cage with a shorter one to a 20" kids bike where there is used a long cage derailleur that almost touches the ground with the lowest gear on. Customizing this cheap derailleur might sound ridiculous but, by a quick look, I did not find cheap derailleurs with mid or short cage and buying an expensive derailleur for a kids bike feel like waste of money.
useful info and good tutorial. you mentioned cross-compatibility between the mechanical and DI2 cages in the 6800-series. Is that still valid for the more recent versions (R8000 and R8050)?
Ryan Johnson, to answer your question, maybe. It depends on how much slack is in your chain. I would normally advise you to just put a new chain on Reasons: 1) it's always good to have a fresh chain on your bike. 2) most likely there isn't enough slack in your current chain to make it work. If your want to try and make it work watch the video by ParkTool company on how to put on a new chain and watch the part for sizing the new chain. If you want more info I'm happy to help.
Derek Goronson Hi again, great instructions for changing the cage to long and I managed that no problem. I took the bike to a local shop and it seemed to work fine on the original chain but he didn't like the angles. He changed it and the chain wouldn't move after about 2/3rd up the cassette. He added some links back but now when on 32 T there is a grinding noise. If he physically held the derailleur cage more vertical then the noise goes, but in its natural position it returns ; any ideas please?
Ryan Johnson, glad you got the cage switched out. About your grinding issue. I'm not totally sure what it could be. My best guess from your description is that the derailleur ganger is bent. What frame do you have? If it had a derailleur hanger then generally that is a cheap and easy thing to have changed out. I have had bend derailleur hangers that cause all kinds of problems to the rear end of the bike. Everything from grinding gears, skipping chain, and even having a whole derailleur getting sucked into a wheel. Another possible thing it could be is that something is tightened to much. Check the hockey wheel bolts. If you have a new chain, in damaged derailleur hanger, and properly tuned shifting then everything should be fine. It odd that the shop mechanic coined the diagnose the issue considering it worked fine before they worked on it. Do you have more info? Maybe ask another mechanic if the things I mentioned all check out.
My girlfriends dura ace 11 speed DI2 rear derailleur cage was spun 180 degrees by a well meaning guy attempting to fix a flat. I wasn't there. I need to spin it back and am hoping this video halps. If it' too loose or indeed bent, what mechanical Dura ace derailleur shoukld I harvest parts from? thx Rich
@@CyclingSatan Thanks, actually in the meantime I found a video showing that you can get the actual parts and do the swap, let's see : th-cam.com/video/ZlvhXn1SCCs/w-d-xo.html - they're not easy to locate though but I found them for the 8050 !
Hi derek, is it doable to change the ZEE RD 10spd short cage to a longer one? I can only order an SLX outer and inner plate in my location. would it fit the ZEE? Thanks
There should be no lateral play. If there is some lateral movement something is lose. You don’t want lateral play in the derailleur because it will likely have a negative effect on shifting.
As the shimano 105 is short, I'm thinking of replacing it with Shimano deore M8000 long cage. This is because I want to change to 11-42t from 11-28t. Are they compatible and can it be done? I'm just tired pushing the bike when going uphills
As far as I understand, Shimano 105 is only compatible with Shimano 105, Ultegra is only compatible with Ultegra, so on and so forth. So unfortunately you wont be able to make that switch unless you have the same model. WHile Deore is a fine product, it is affordable and it wouldn't make sense to buy a new derailleur just to switch a cage out. You have two options. 1) Buy a new derailleur with the correct cage length. 2) Buy a used derailleur online that is the exact model you have but with the longer cage and switch it out or use that used derailleur if its in good enough shape. Again, it would probably be best to just buy a new Diore M8000 derailleur as you can likely spend very little. Gearing is really important so it would be money well invested and defiantly help you get up those hills:) Hope this help you out. Cheers.
Viesturs Ošis it’s hard to find them now as Shimano doesn’t sell them separately anymore. I could suggest you contact a local bike shop and see if they have anything. Or you could ask a cycling group on Facebook if they have any old derailleurs that would work.
This is what TH-cam is all about! Talk about perfection. Exactly what I was looking for. Thank you for a wonderful video. Now im of to replace my own jockey wheels and plates!
I was trying to refit my di2 6870 after a cage change late at night. I was going insane because it was just hanging there. One quick watch of your video and I saw how you had to load up the spring, job done, too easy. I just wish I had have watched it before I started 2 hours earlier!! lol
Glad it helped! We have all been there.
Thanks. This was exactly the video I was looking for before I attempt to replace my derailleur cage.
Exactly what I was looking for. Thank you for that detailed overview and excellent explanation that give me the confidence to go make that cage change.
Just what I needed. My di2 wasn’t shifting properly and was really stiff. Stripped it down, cleaned it all up and used the video to put it all back together. Works as new. Well done and thank you so much.
Glad it helped. Enjoy many more miles on the derailleur.
Very helpful, particularly on how to get the spring to tension the cage in the proper direction. Removing the screw so that the cage can swing past was crucial for me when installing the Rockbros OSPS on a Durace derailleur. The instructions provided by Rockbros were poorly explained and written in the worst Chenglish I've ever encountered. Thanks
Thanks, I m glad it helped you out.
Norman1951 Norman how do u find the Rbros wheels bro? Was checking them out.
You’re awesome for sharing this!! I have gone through two rear derailleurs in the last two weeks. What a coincidence. The first one I smashed into my spokes squeezing between two rocks and just yesterday a stick threaded it’s way through my jockey wheels and into the spokes and pulled my derailleur backwards. Ugh!! The horror. No I have a race in 9 days and am scrambling to find another. None on eBay. But I have a old one I can take apart thanks to your video.
After a long time searching, i find a full cage of Dura ace 9070 di2 for me. My original was damaged by a chain cross, with a wrong toutch at the STI. Your video is cool, thank you so much. The Ultegra 6870 looks the same to Dura ace 9070. Thanks bro.
Rodrigo Of War, thanks. Glad you fixed it up.
Great video! Remember not to mix up your pulley wheels. The top one is the guide pulley (G-pulley) and the lower one is the tension pulley (T-pulley). They look very similar but on more expensive mechs are different, as they both do different jobs.
Nath Jefferies , great point. Thanks for pointing that out.
Mine was sticking after a ride in the rain. Never took it apart before. Thanks for the helpful vid!
As an update I just bought long cage Ultrgra plates off eBay in the Uk so they can be sourced 👊
This video helped a lot man, thanks!
3rd reason: to get a ceramic cage ;)
thanks for the great video!
Lol. That’s a good point. Same thing applies to adding that upgrade.
Perfect tutorial. Exactly what I was looking for. Thanks very much.
Glad it helped ✌️
good tip!
thanks for the detailed video. It helps a lot to me. Especially I want to purchase a long cage to be compatible to 11-32T.
But Dura-ace doesn't have the long cage spare part available. SO I need to get the RD-6800 GS part to replace with my current SS cage.
additional question, so basically I have a rotor Qrings 52/39 with 11/28 cassette, which mean if I change to 11/32, it needs to have a longer chain? The chain still fresh now btw.
So you will likely need to replace the chain. But go ahead and see if your chain will take the new cassette. You will know that it is so long if your rear derailleur is basically straight.
@@CyclingSatan Thanks mate for the video once again, but I found out the rear end was slightly bent and the gear won't go up further more. So I might need to change my frame now :(
Very Informative!
very helpful!! Been having trouble with my rear der not staying adjusted when I go from small to big chain-ring. Was considering replacing the cage but seemed difficult. Now it doesn't.
Glad it helped. Let me know if you have other issues I can make a video about.
Thanks for this. BTW, I was able to buy cage plates from Ali Express after our bike supplier was unable to provide them.
Fantastic. We may add an update after I look into that. Cheers!
@@CyclingSatan
Sorry, I did not give much for details. You need to buy the inner and the outer separately. Total cost is $30.00 for the M8000 SGS plates. However, as you can buy the complete M8000 SGS derailleur for $61.00, the next time I ordered, I just got the whole derailleur just in case I had previously caused any trauma to the derailleur when I bent the cage plates. When I got it, it appeared to be a genuine Shimano OEM part.
Thanks a lot for this video 👌🏻
My inner plate doesnt have an allan wrench slot....it is a flat surface. The replacement has a flat surface as well and it seens you have to unwind the entire arm to unscrew...but when u do that the spring begins to unwind out of the slot
This video is gold, thank you a lot!
P.S.: by the way, while you're at it and you disassembled the cage, do you suggest any extraordinary maintenance to the rest of the derailleur?
giovanni spinotti, the only other thing you could do is replace the jockey wheels. I replace them every year just because, but other than that you should be good.
Great. Subbed.
My dealier broke when I was wheeling
On tension spring do need to greese it regularly or once a year?
Once a year or so.
Sounds like i'm screwed and need a new rear derailleur. My MTB Ibis Deore inner cage was bent and finally broke yesterday.
Great video dude, helped heaps.
Or maybe you just need to do maintenance! :D
Thanks for this, I have a sram x0 but I don't think would be far from this! :)
Very practical and helpful video. Have you inspected the compatibility of different cages between derailleurs? Do you have to know the exact model of your derailleur to get the right cage model? I'd need to replace a cheap Altus derailleur cage with a shorter one to a 20" kids bike where there is used a long cage derailleur that almost touches the ground with the lowest gear on. Customizing this cheap derailleur might sound ridiculous but, by a quick look, I did not find cheap derailleurs with mid or short cage and buying an expensive derailleur for a kids bike feel like waste of money.
Kalle Kamula from my understanding you must have an exact matching derailleur.
useful info and good tutorial. you mentioned cross-compatibility between the mechanical and DI2 cages in the 6800-series. Is that still valid for the more recent versions (R8000 and R8050)?
I suppose changing the cage is the same for Campagnolo?
Good video! Now where do I source my new Shimano DeOre M615 inner cage plate? Mine is broken.
So, can I change to long cage and to 32T from 28T cassette using the same chain or does it need to be longer ? Di2. Thanks
Ryan Johnson, to answer your question, maybe. It depends on how much slack is in your chain. I would normally advise you to just put a new chain on Reasons: 1) it's always good to have a fresh chain on your bike. 2) most likely there isn't enough slack in your current chain to make it work.
If your want to try and make it work watch the video by ParkTool company on how to put on a new chain and watch the part for sizing the new chain. If you want more info I'm happy to help.
Derek Goronson awesome thanks- the chain is only about 6 months old but will watch the video. Planning on trying this tomorrow 😬
Derek Goronson Hi again, great instructions for changing the cage to long and I managed that no problem. I took the bike to a local shop and it seemed to work fine on the original chain but he didn't like the angles. He changed it and the chain wouldn't move after about 2/3rd up the cassette. He added some links back but now when on 32 T there is a grinding noise. If he physically held the derailleur cage more vertical then the noise goes, but in its natural position it returns ; any ideas please?
Ryan Johnson, glad you got the cage switched out. About your grinding issue. I'm not totally sure what it could be. My best guess from your description is that the derailleur ganger is bent. What frame do you have? If it had a derailleur hanger then generally that is a cheap and easy thing to have changed out. I have had bend derailleur hangers that cause all kinds of problems to the rear end of the bike. Everything from grinding gears, skipping chain, and even having a whole derailleur getting sucked into a wheel.
Another possible thing it could be is that something is tightened to much. Check the hockey wheel bolts.
If you have a new chain, in damaged derailleur hanger, and properly tuned shifting then everything should be fine. It odd that the shop mechanic coined the diagnose the issue considering it worked fine before they worked on it. Do you have more info? Maybe ask another mechanic if the things I mentioned all check out.
My sram x9 cage just hangs and won't give tension to my chain. Is the internal spring FUBAR?
I forgot to wind the derailleur when reinstalling my chain 😂🤦♂️
Can the pulley cage of 105 r7000 will be fit in 105 5800?
My girlfriends dura ace 11 speed DI2 rear derailleur cage was spun 180 degrees by a well meaning guy attempting to fix a flat. I wasn't there. I need to spin it back and am hoping this video halps. If it' too loose or indeed bent, what mechanical Dura ace derailleur shoukld I harvest parts from? thx Rich
I just switch from a short to a long on my Di2 last night. Do you think I would need a longer B tension screw?
Can i replace slx mid cage to long cage
Does a Deore XT have a detachable cage?
Mine got sucked into the wheel. Now i need a new rd, fd, and hanger.
howsyomama _ thats rough. I had a close call yesterday with my new gravel bike.
Hi there, nice video! Did you experience any battery drain with your bent di2 derailure? Thanks
No issues with the battery life. The only thing that could cause battery issues would be damage to the battery itself.
Great tutorial, would this work with the Di2 RD-R8050 too ? Would have to use the RD-8000 I suppose...
I’m not 100% sure. In general ultegra derailleur cages are comparable with each other in electric or mechanical form. How that helps
@@CyclingSatan Thanks, actually in the meantime I found a video showing that you can get the actual parts and do the swap, let's see : th-cam.com/video/ZlvhXn1SCCs/w-d-xo.html - they're not easy to locate though but I found them for the 8050 !
Can I replace acera's cage?
Hi derek, is it doable to change the ZEE RD 10spd short cage to a longer one? I can only order an SLX outer and inner plate in my location. would it fit the ZEE? Thanks
Lito Villaflor If it’s the same model of derailleur it should be fine.
Will any cage work with the deraileur? i have a bent shimano tourney RD TX800
Have u ever replaced a Xtr 9 speed m972 shadow cage before?
Hi theres a way. How to put back the tension of derauliur
Start watching around 4:12. That’s where I take the tension off. If you reverse that step you will have it back.
on the cage side, there are two notches for the spring. which one to use?!
Daniel Secrieru not 100% certain as I just used the one first one and it worked. I would try the closest one.
I have 105 with ss cage and I want a longer cage is tourney rd long cage compatible with 105?
105 is only compatible with 105. Same with the other models like Ultegra and DuraAce.
may i ask if it is normal for the cage to have some lateral play?
There should be no lateral play. If there is some lateral movement something is lose.
You don’t want lateral play in the derailleur because it will likely have a negative effect on shifting.
@@CyclingSatan there is little lateral movement and the shifting is perfect
@@CyclingSatan the movement il like this: th-cam.com/video/JdWEKN-vmik/w-d-xo.html
If your shifting is good then no real reason to worry. If you notice it getting worse I would recommend looking into it more.
As the shimano 105 is short, I'm thinking of replacing it with Shimano deore M8000 long cage. This is because I want to change to 11-42t from 11-28t. Are they compatible and can it be done? I'm just tired pushing the bike when going uphills
As far as I understand, Shimano 105 is only compatible with Shimano 105, Ultegra is only compatible with Ultegra, so on and so forth. So unfortunately you wont be able to make that switch unless you have the same model. WHile Deore is a fine product, it is affordable and it wouldn't make sense to buy a new derailleur just to switch a cage out. You have two options.
1) Buy a new derailleur with the correct cage length.
2) Buy a used derailleur online that is the exact model you have but with the longer cage and switch it out or use that used derailleur if its in good enough shape.
Again, it would probably be best to just buy a new Diore M8000 derailleur as you can likely spend very little. Gearing is really important so it would be money well invested and defiantly help you get up those hills:) Hope this help you out. Cheers.
There is something call "goat link" which can be found on ebay use that to go bigger cassette
where i can buy cages?
Viesturs Ošis it’s hard to find them now as Shimano doesn’t sell them separately anymore. I could suggest you contact a local bike shop and see if they have anything. Or you could ask a cycling group on Facebook if they have any old derailleurs that would work.
Hi man please share the part number
Can i do this on shimano sora?
If you have the right parts the process is very similar.
can i have it even if it is bent or broken😭😭 i just need parts badly😭