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  1. #1
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    Feb 2004
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    Shimano Bottom Bracket Mystery

    I mail ordered an ES51 E type bottom bracket. Sent was a ES51 M bottom bracket. Shimano is closed for the next few days...does anyone know if there is a differece between these two products? I do not have an original to compare one to another. Thank you as always. Scott

  2. #2
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    Reputation: wickerman1's Avatar
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    Dec 2003
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    Quote Originally Posted by cham
    I mail ordered an ES51 E type bottom bracket. Sent was a ES51 M bottom bracket. Shimano is closed for the next few days...does anyone know if there is a differece between these two products? I do not have an original to compare one to another. Thank you as always. Scott
    E type is for E type front derailleur therefore you use your front derailleur for the spacer instead of a regular bb spacer.. At least thats my thoughts lol.
    i also use ES BB's

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