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  1. #1
    China_Biker
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    Bottom Bracket Help

    I have an Aerelli mountain bike, and I recently snapped the axle. The model number is a Shimano BB-UN72-E. I believe the cups are Itallian threaded 36x24's but I am not 100% sure. Does anyone know where I can order annother one of these? Thanks

  2. #2
    Member 05HaroF2's Avatar
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    Look around, Google the proper crank for that bike, and remember ebay, and the search button are your friend.
    05 Haro F2
    Haro Cassette rear wheel & 25 T sprocket, Dk Octane forks, Shadow slimmer seat, Federal seat post clamp, S&M redneck stem, Odyssey PC pedals, Odyssey Trigger, Alex 22' Front rim, Primo, chad degroot sig. grips, Haro Metal bar ends on trimmed bars, KMC red chain, Primo 'The wall' rear tire, Odyssey Aikten front. [ Awaiting new crank ]

    "Its not how you stand by your bike, Its how you ride your bike"

  3. #3
    surly old man jgedwa's Avatar
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    You snapped an axle? You mean the spindle itself? You are a gorrilla, sir.

    Sorry, I cannot directly help with the problem. If it is Italian threaded, it will take more leg-work to find a new BB, but not so hard. Don't give up on it.

    By the way, can you just replace the spindle and not the cups themselves? That will open up many other options for replacement.

    jim
    Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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  4. #4
    Member 05HaroF2's Avatar
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    Quote Originally Posted by jgedwa View Post
    By the way, can you just replace the spindle and not the cups themselves? That will open up many other options for replacement.

    jim

    You would think itd just be the spindle, But if he snapped the spindle, and it smacked the cup, it couldve cracked the cup, I dought it, but its a possablyity.
    05 Haro F2
    Haro Cassette rear wheel & 25 T sprocket, Dk Octane forks, Shadow slimmer seat, Federal seat post clamp, S&M redneck stem, Odyssey PC pedals, Odyssey Trigger, Alex 22' Front rim, Primo, chad degroot sig. grips, Haro Metal bar ends on trimmed bars, KMC red chain, Primo 'The wall' rear tire, Odyssey Aikten front. [ Awaiting new crank ]

    "Its not how you stand by your bike, Its how you ride your bike"

  5. #5
    Always find my way home
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    Not familiar with that bike but the BB you described is a sealed unit, negating the possibilinot ty of just a new spindle(axle, as you called it). There are other numbers on the label of the old BB shell that tell you the size/thread you need for the replacement. There should a number like 73x118, 73 the BB shell width and 118 is the spindle length. If the first number is 68 or 73 the shell is English thread- 70 is Italian. If the shell label is covered in rust these details should be visible. If in doubt, measure the shell and spindle w/ a caliper.
    "Send lawyers, guns, and money"

  6. #6
    China_Biker
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    Thanks for the help!

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