Ultegra lockring not fitting hub

thebigman
thebigman Posts: 58
in Road general
Hi folks. on changing my cassette my new ultegra lockring wont fit my hub. The wheels are fulcrum racing 3's and i had a dura ace 12-25 on it before. The lockring that came of seems wider. I tried using the original lockring on the ultegra cassette but it fowls the chain when on the 11t sprocket. anyone had this problem before?

thanks

Comments

  • First.Aspect
    First.Aspect Posts: 17,206
    Check that the smaller sprockets are correctly seated.
  • N0bodyOfTheGoat
    N0bodyOfTheGoat Posts: 6,057
    Been ages since 11T wasn't my hardest sprocket on a bike, but doesn't the lockring have to match the sprocket, so a 12T lockring will cause problems for a new cassette with an 11T?
    ================
    2020 Voodoo Marasa
    2017 Cube Attain GTC Pro Disc 2016
    2016 Voodoo Wazoo
  • singleton
    singleton Posts: 2,523
    10 or 11 speed?
    Are the old and new cassette both the same number of gears?
    If the wheels are compatible with both 10 and 11 speed, then there will be a spacer that you need to fit for 10 speed, but you need to remove it for 11 speed.
  • First.Aspect
    First.Aspect Posts: 17,206
    No they are all the same. If the lock ring is further out than the hub, something isn't quite seated. You can sometimes get the lock ring on there, even so. Most likely it is the 11t because the final sprocket itself sits proud of the free hub and so only has intents rather than slots to go over the splines. Quite easy to be mis-installed.

    Easy to check though.
  • Mad_Malx
    Mad_Malx Posts: 5,183
    Are you using a spacer of any sort?
  • flycop
    flycop Posts: 20
    I had a similar problem a couple of weeks ago, it was the 11T ring that was not sitting correctly. It seems that it can be turned around the keys on the freehub and it will still fit. You only notice that it's not sitting square when you look very closely at the ring.
  • thebigman
    thebigman Posts: 58
    The actual threaded part of the lockring are different diameters. The one that came off is wider than the ultegra that i want to put on. the cassette fits on fine and everything is seated.
  • photonic69
    photonic69 Posts: 2,820
    Lockrings for Shimano/Sram are all one size as far as I'm aware so they will all fit Shimano/Sram freehubs. (It's not Campag or XD is it?).
    Will the lockring on its own screw into the end of the freehub?


    Sometimes. Maybe. Possibly.

  • navrig2
    navrig2 Posts: 1,851
    photonic69 said:

    Lockrings for Shimano/Sram are all one size as far as I'm aware so they will all fit Shimano/Sram freehubs. (It's not Campag or XD is it?).
    Will the lockring on its own screw into the end of the freehub?

    This, especially checking without the cassette on.

  • Munsford0
    Munsford0 Posts: 678
    Do you really mean different diameters? Or are you talking about the thickness of the lockring / number of threads?
  • thebigman
    thebigman Posts: 58
    I mean different diameter. it was a 10 speed dura ace cassette that came off and the 10 speed ultegra cassette has a different diamter lockring than the one that came off.
  • photonic69
    photonic69 Posts: 2,820
    Post some pictures to show us the differences. The thread in the end of the freehub body into which is screws will be the same for all Shimano/Sram fittings, hence "does the lockring screw into the end of the freehub with no cassette mounted"?



    This diameter should be the same


    Sometimes. Maybe. Possibly.

  • mrdsgs
    mrdsgs Posts: 337
    older fulcrum shimano 9/10 speed freehubs came with their own locking because they are a campagnolo company, the standard shimano lockring has a diameter that is too wide. Newer fulcrum 0/1/3 freehubs for 9/10/11 speed, the smooth white ones, accept the standard shimano lockings.
    Colnago Addict!
  • stn5
    stn5 Posts: 44
    I've had this issue when the freehub is notched meaning the cassette doesn't happily sit far enough back when the wheel is upright. Try putting the wheel on its side, perhaps over the kitchen sink :)

    Campag/Fulcrum alloy freehubs suck. Much prefer the steel ones but on both the bearings do not last at all.

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