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  1. #1
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    Shimano 600 EX vs 600 AX.

    Here I go again, difference between Shimano 600 EX and Shimano 600 AX head sets???

  2. #2
    Senior Member
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    If you look back in the Shimano catalogues for the era, you will not find 600AX or Dura-Ace AX headsets. The supplied headsets were 600EX or Dura-Ace EX with a clear, plastic cup with blue lettering that fit over the upper stack to make it more aerodynamic. I had a Dura-Ace AX equipped Velo Sport Mirage and could detect no difference. I don't think they even changed the label bands on the cups.

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