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  • Shimano MTB and road Octalink BBs, are they interchangeable?
  • PJay
    Free Member

    I run an XT Octalink BB with a 118mm axle on my bike. The XTs (ES-71) are no longer made and hard to source. To the eye they look very similar to Shimano’s 105 5500 road BBs, also described as Octalink. Are they interchangeable or different standards?

    Posted 15 years ago
    Steve-Austin
    Free Member

    they’re different. the splines are shorter/longer.

    Posted 15 years ago
    Mister-P
    Free Member

    You have to stick to an ES bottom bracket.

    Posted 15 years ago
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