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  • A wheel builders question – is this doable….?
  • twang
    Free Member

    If I swapped my 721 rim for a 521, would I need longer spokes? Can’t seem to find any info on Mavic site for the dimensions of either..Ta 🙂

    Posted 10 years ago
    martymac
    Full Member

    you could try the sheldon brown website, there is a spoke calculator on there. its always worked for me in the past.

    Posted 10 years ago
    Keef
    Free Member

    no,ERD is 535 for both…..

    Posted 10 years ago
    cynic-al
    Free Member

    google each rim’s erd (effective rim diameter), the difference will be twice the difference in ideal spoke length.

    Posted 10 years ago
    twang
    Free Member

    Ah, it was the ERD I was after!
    Great, thanks for that. Here goes my first rim swap – what could possibly go wrong….:-)

    Posted 10 years ago
    Keef
    Free Member

    tip-
    if it’s your first rim swap,tape the new rim to the old,with the valve holes aligned 😉

    Posted 10 years ago
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