Sprockets Hub adapter too large

Discussion in 'Transmission / Drivetrain' started by DanTheDIYGuy, Jul 28, 2016.

  1. DanTheDIYGuy

    DanTheDIYGuy Member


    I just got a new bicycle for my mb rebuild and want to use a sprocket hub adapter to prevent wheel warp. The lowest size hub adapter I can find is for 1" hubs, I have a .90" hub. Any ideas if I could make a 1" adapter work, or is there an place that you know of that I can order one of the correct size? Thanks!

  2. Frankenstein

    Frankenstein Well-Known Member

    Well for starters can you use a different hub? Probably not, you likely explored the idea. Mentioned it anyways.

    I can't find anything smaller than 1 inch either, but the difference is only .1 inches, which a piece of metal which is .05 inches thick wrapped around the hub could work, that's about 1.25mm thick so you know. The manufacturer will almost definitely alow for some variation to alow the adapter to squeeze slightly smaller than 1 inch, otherwise it wouldn't be very tight and end up slipping, for all you know the adapter will fit on a .9 inch hub.

    Also if the hub you will use has a disk brake attachment, then simply use a sprocket that can be used on that, or use an adapter to go from the disk brake rotor holes to a standard 9 bolt sprocket.

    Super worse case scenario, buy a shift kit and enjoy the art of actually having a form of a transmission, which you'll love having regardless.
  3. David Bogle

    David Bogle Member

    I had the same issue, I cut apiece of pipe and used it for shims, it's working fine
  4. Bike guy 69

    Bike guy 69 Guest

    Is it still working just fine? Could i use rubber or leather as a shim? Were you guys as upset as me when you found out it didn't fit? Or... Did you guys measure twice buy once :oops:
  5. DanTheDIYGuy

    DanTheDIYGuy Member

    I forgot I had posted this :p

    It worked out very well actually. I had bought a clamshell adapter. It was a very tight fit through the spokes, as I had accidentally bought rims with the wrong number of spokes. I spent a good 3 hours getting the bolts to go through the spokes to the clamp on the axle. It also had a built in pineapple type hub adapter in order to grab hold onto more of the hub.
    The clamshell came with steel shims. I used two, they act somewhat like springs, and compress as you tighten the clamshell. If yours does not come with some, I recommend you buy a slightly undersized copper pipe fitting and cut it into two shims. The copper with bend into place, while also creating a more secure fit. Don't use leather, it rots with moisture.