anyone installed a shimano ultegra rd r8000 rear mech??

turbo1191
turbo1191 Posts: 501
edited May 2018 in Workshop
Hi folks. just wondering if anyone has installed one of the above? I'm in the proccess of doing it but just a bit concerned about the routing of the cable. on the old ultegra rear mech the cable was routed outwardly but it seems the new mech heads inwards.. i've included a pic - it all just seems very close to the rear wheel! picture is before ive trimmed cable.. :shock:

36210736131_1b194e41e8_k.jpg20170803_121157 by thebigman1191, on Flickr


36210912961_82b353c36f_k.jpgRear mech 2 by thebigman1191, on Flickr

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,321
    Not an Ultegra, but an XT shadow, which is very similar. Yes, you bend the cable outwards, once you've clamped it and it will never give you any bother
    left the forum March 2023
  • turbo1191
    turbo1191 Posts: 501
    Ok.. great, thanks.. just wanted some clarification before i started cutting cables!
  • turbo1191
    turbo1191 Posts: 501
    All fitted, but just wondering about the 2 points at which you can attach it to the hanger, its on a roadbike, i presume this is right?!


    35540945573_0da4415ca9_k.jpg20170803_151028 by thebigman1191, on Flickr
  • ugo.santalucia
    ugo.santalucia Posts: 28,321
    Yes, it looks fine to me
    left the forum March 2023
  • turbo1191
    turbo1191 Posts: 501
    great - thank you
  • Tre06
    Tre06 Posts: 2
    The housing of the cable has a tight bent. On my bile turning the barrel does not have any impact with the cable tension.
    The bent is too tight so the spring does not have enough power. The routing is the same as in the picture above, does it work on your?
  • turbo1191
    turbo1191 Posts: 501
    I found that i had to actually change the barrell adjuster as the one on the r8000 series is terrible. i used an old ultegra adjuter and that gave me adjustment.
  • Tre06
    Tre06 Posts: 2
    I have contacted the Bike Hot line because such design change was tested and approved. How can be that I have to change barrel?
    I am curious if I get a response.
  • hellfire15
    hellfire15 Posts: 19
    interested to know if you have any issues removing the rear wheel since I installed mine the job is a lot harder than it was with the old ulegra
  • atiroocky
    atiroocky Posts: 1
    Hello,

    I'v got a B'twin Ultra Cf and the exit of the rear shift cable is very close to the rear derailleur. I used to use a Shimano SIS OT-SP41 as housing but the too short path creates a bend and makes the adjustement very difficult (lake of softness).

    I think that Shimano recommands to use the OT-RS900 as housing for the rear derailleur R8000 and R9100. This housing is softer and will not bend when the radius of curvature is to short. I think the conception looks like brake housing without the drawbacks. You only can buy 240mm length, then you cut it in function of the distance between the exit of the frame and the barrel adjuster.

    As I'm concerned, on my R8000, I replace the barrel adjuster by my old 105 and replace the OT-SP41 housing by a Jagwire brake housing (residue from brake housing replacement). Now I can adjust the tension of the shift cable easier and the housing is not bent ! More over, the shifting performance is still good !
  • svetty
    svetty Posts: 1,904
    atiroocky wrote:
    Hello,

    I'v got a B'twin Ultra Cf and the exit of the rear shift cable is very close to the rear derailleur. I used to use a Shimano SIS OT-SP41 as housing but the too short path creates a bend and makes the adjustement very difficult (lake of softness).

    I think that Shimano recommands to use the OT-RS900 as housing for the rear derailleur R8000 and R9100. This housing is softer and will not bend when the radius of curvature is to short. I think the conception looks like brake housing without the drawbacks. You only can buy 240mm length, then you cut it in function of the distance between the exit of the frame and the barrel adjuster.

    As I'm concerned, on my R8000, I replace the barrel adjuster by my old 105 and replace the OT-SP41 housing by a Jagwire brake housing (residue from brake housing replacement). Now I can adjust the tension of the shift cable easier and the housing is not bent ! More over, the shifting performance is still good !
    And there were all those highly skilled Shimano engineers working on designing the derailleur with new parts when all they had to do was stick in an old 105 adjuster and an offcut of old brake cable and it would have been sorted. I bet they feel silly - NOT! :roll:
    FFS! Harden up and grow a pair :D
  • timshogun
    timshogun Posts: 2
    I am in process of installing an rd r8000, and found the barrel adjuster does not work. I could not believe Shimano would sell something like that, but reading this topic helped me stop trying to see what could be wrong, and I swapped out an adjuster from old derailleur.
    I am still having problems getting it to shift onto largest cog. It looks like the rd has a couple optional positions for installing, so I have tried a couple. No change. Any ideas? Maybe another position.
    I am pretty disappointed with Shimano at the moment.

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