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Di2 shifting problem

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  • December 5, 2019 at 7:00 pm #30321
    joachimvadseth

    I bought the RD-R8000GS (medium cage) a couple of months ago because I thought my RD cage was bent, and I also wanted to run bigger cassettes, and my RD hanger was not bent, so had to give it a try.

    The rest is ST-6870 groupset with the SM-EW90 ans SM-BTR1 battery.

     

    The RD dont want to move all the way out or in. It wont slightly overshift into the smallest cog even if the limit screw is all the way out. It wont shift properly up the cassette either. When it comes to the largest cog (32t) it wants to shift another gear up, wich means chain going over the top and into the wheel. When the H limit screw is set properly to not overshift on the 32t, the RD just tries and tries until it gives up shifting and shifts back half a cog. The microadjustments is set to 0 (16).

    So I cant move the RD properly down the cassette it seems like. If i set the microadjusts to maximum the 11t is ok, but not the rest, since the H limit is not OK. Tried to hold the button on the SM-EW90 and let the gears cycle through, since its the only function part from the microadjusts I belive. 

    Visited the local shop (not a proper shop, a “we have everything and its cheap”, so dont trust the mechanichs there that much, but I asked them to upgrade mye firmware, and it did not return any error codes either. The e-tube chart I think say my battery is not compatible but, the problems was there on the RD-6870 too. 

     

    Any ideas?? Thanks

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  • December 6, 2019 at 2:13 pm #953637
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    kil0ran

    Could be Gear Position

    Could be Gear Position control

    https://e-tubeproject.shimano.com/about/gearpositioncontrol.html

    “NOTE

    If you use combinations of front and rear derailleurs besides those recommended, the shifting-restricted range may become larger.
    Restrictions on gear position can be disabled via the Customize menu in E-TUBE PROJECT. (Restrictions cannot be disabled for 52–36T or 50–34T.)”

    Although I don’t recall ever having that on my 6870 system. 

    As our squirrely friend notes, if you have the right battery charger you can download eTube software and tinker around with the settings. You can also do firmware updates using it. Need a Windows laptop though. 

    When doing firmware updates just make sure you do the battery first, then the battery holder, then the shifters, and then ideally front mech before rear mech. If it doesn’t solve it I’d look at potentially trying the latest external battery holder – BM-DN100. Maybe order it from somewhere that offers free returns. You’ll also need the little cable fork – TL-EW02

    December 6, 2019 at 1:17 pm #953635
    0
    hawkinspeter

    Have you got the charging

    Have you got the charging adapter for the Di2 system i.e. the box that looks like a small power supply but with a usb socket on it and a cable that plugs into funny Di2 connector? If so, and you have access to a suitable Windows laptop then you can download and install the ETube software from Shimano (https://e-tubeproject.shimano.com/). Connect the Di2 charger to a USB cable connected to the laptop and you should then be able to configure your Di2 system (including upgrading firmware etc).

    December 6, 2019 at 12:35 pm #953633
    0
    joachimvadseth

    Yea, how do I do that? 

    Yea, how do I do that? 

    Im the bike first owner. Its a Gavia Zoncolan SR2 sold by bikeshop.no in 2014 I think. 

    It came with the SM-EW67 y-box, but thought that might cause the problems so I bougth the SM-EW90 box. Not that keen on spending more money to try to fix this issue with a new battery I just say.. But it will maybe rule out some factors tho. 

    December 6, 2019 at 11:46 am #953631
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    kil0ran

    Just checked and the BTR-1 is

    Just checked and the BTR-1 is listed as compatible with R-8050

    https://productinfo.shimano.com/#/lc/ultegra_r8050/2×11

    So that I think rules out any Di2 incompatibility. Not sure how you got about doing a hard reset on a Di2 battery but that’s what I’d start with if it’s possible.

    December 6, 2019 at 11:37 am #953629
    0
    kil0ran

    The BTR-1 doesn’t support any

    The BTR-1 doesn’t support any of the new intelligent features like syncro-shift and cross-chain avoidance. That might be why it isn’t listed as compatible with the R8000. 

    Shimano also made changes with R8x Ultegra around chainline and in particular front mech position (2.5mm further out) but that doesn’t explain why there was also an issue with 6870

    What bike is it? Was it supplied with 6870 Di2? Are you the original owner?

    When I ran 6870 I recall I ended up using the internal battery (the seatpost one) coupled with the external battery case from the XTR Di2 range. What I can’t remember is why – might have been compatibility, might have been thinking of future-proofing the system as I planned to get a new frame and go fully internal. 

    Also, all the logic and “intelligence” for Di2 is stored in the battery. If you’re not the original owner it might be worth getting your bike shop to do a hard reset on the battery. Another option is to pop along to a local club who might have someone who can lend you the full diagnostic kit. I’ve also seen people renting it out on eBay.

    Edit: Actually the BTR-1 can do synchro shift, but you need the latest external battery mount (BM-DN100)

    December 6, 2019 at 9:17 am #953627
    0
    joachimvadseth

    Well, I tought of betting the

    Well, I tought of betting the PC-kit or bluetooth-kit to solve this but it is SO GOD DAMN EXPENSIVE and it may not work either! 

    But your idea/solution seams possible. However it will shift down to the smallest cog (and stop on the #9 or something when in the little ring), but it wont shift far enough down, and it shifts too far up on the 32t. 

    I asked the bikeshop where I bought the bike if they could lend me the equipment, but they said no. The shop is 600kms away so. 

    December 6, 2019 at 6:25 am #953625
    0
    MattieKempy

    I had a similar problem: new

    I had a similar problem: new RD8000 rear mech not shifting into the smallest two gears. I tried the hanger (it was fine) the b-screw (it was fine) the high and low limit screws (they were fine) and in the end took it to my LBS (not a cheap and nasty one) who didn’t fix it either. Turns out my problem was with the íntelligence’ of the rear mech, which for some reason is programmed not to shift into the smallest gears when in the inner ring up front. 

    However, changing the settings file on e-tube (I use the app not the computer as I don’t have a Windows computer) solved the issue. I changed it so that the ‘brain’thinks the bike is running 53/39 and 11-25, putting the gear settings into ‘not fixed’ and the problem has gone away. It’s actually running 52-34 and 11-28, which apart from the odd clunky front shift, works just fine. I haven’t tried changing the front ring settings to 52-36 yet to see if that works, but will do.

    To get the settings files to save you have to first save them to the app, then drag them to the bike (it’ll make sense if you have the app) for them to load. I’m not sure how  you’d do it with the computer programme but I’m sure you can work it out.

    Hope this helps.

    December 6, 2019 at 5:54 am #953623
    0
    joachimvadseth

    I tried two different

    I tried two different cassettes and wheels. No spacers behinde it. The problem is also on my KICKR. 
     

    If you’re refering to page 44 in that manual it isnt a big help, is it. Maybe I can try to remove the RDs extended hanger? 

    December 5, 2019 at 10:27 pm #953621
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    Pilot Pete

    Have you followed the dealer

    Have you followed the dealer manual instructions for setting up the rear derailleur? https://si.shimano.com/pdfs/dm/DM-R8050-01-ENG.pdf

    Sounds like an adjustment issue to me…

    PP

    December 5, 2019 at 9:36 pm #953619
    0
    Welsh boy

    It sounds like your cassette

    It sounds like your cassette is not aligned to your rear mech. Have you got any spacers fitted behind the cassette?

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