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Thread: Specialized Steel Repair - Chainstay Dimples...

  1. #1
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    Default Specialized Steel Repair - Chainstay Dimples...

    Ok All! I need some input. I have received this Specialized touring frame from the late 80's for a CS repair (cracked near BB shell). That is not a problem. The issue is that it has some very unique looking Chainstay dimples. I am polling for how to recreate the dimple in the Non-Drive Chainstay… I want it to match the other two in the drive side. So, I am putting it out there for suggestions, theories, and etal… I have included a few images.

    Thanks in advance!

    IMG_2190.jpgIMG_2191.jpgIMG_2192.jpgIMG_2193.jpgIMG_2187.jpgIMG_2188.jpgIMG_2189.jpg
    Gregory White
    Magic Cycle Werks
    www.MagicCycleWerks.com

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    Default Re: Specialized Steel Repair - Chainstay Dimples...

    I've put some dimples in chainstays that look a lot like that. My tooling is pretty... archaic is probably the best word. I use half of an Anvil tube block to back up the tube, and the top of a pipe wrench (smoothed a little bit), place that in a vice and give it a squeeze. Wish I had pics to add here.
    DT

    http://www.mjolnircycles.com/

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    Default Re: Specialized Steel Repair - Chainstay Dimples...

    Create an anvil that mimics the length and valley shape of the dimple then practice on a scrap to see how it looks after pressing the dimple. I suspect that the anvil is not striking the chain stay evenly along it's length, like a brake pad's toe in. Andy.
    Andy Stewart
    10%

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    Default Re: Specialized Steel Repair - Chainstay Dimples...

    +1 on this I reckon
    -Eric
    Quote Originally Posted by Andrew R Stewart View Post
    Create an anvil that mimics the length and valley shape of the dimple then practice on a scrap to see how it looks after pressing the dimple. I suspect that the anvil is not striking the chain stay evenly along it's length, like a brake pad's toe in. Andy.
    Eric S. Zimmerman
    Zimmerman Bicycle works
    and Cinematography
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