Shimano/Campag chainrings - interchangeable?

Discussion in 'Cycling Archive' started by icogs, Jul 18, 2015.

  1. icogs

    icogs Guest

    I need to replace the larger chainring on my rather old 10-speed Campagnolo Record equipped bike. Phew! Campy spares are expensive :0. Is there any reason why I can't substitute the equivalent Shimano Ultegra ring? They are about half the price.
    icogs, Jul 18, 2015
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  2. icogs

    Mike Causer Guest

    Depends. If you know exactly what year the Record kit is then take a
    look at Capt. Sheldon's crib sheet on bolt circle dimensions to get the
    correct size then compare to the Ultegra. If you're not sure of the
    year then you need to measure the bolt circle size, which isn't easy
    with 5 bolts. Sheldon's web page takes care of that though if you
    measure carefully.

    OTOH I'm looking for 1970/80s Record bits. Would you like to sell the
    bike as it is? To tell the truth if the bike was good enough to be
    fitted with Campag Record when new you'd be better off stumping up for
    new Campag or searching at cycle jumbles -- fitting off-brand parts
    will hurt the bike's value.

    Mike Causer, Jul 18, 2015
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  3. icogs

    Clive George Guest

    Campag was 135mm while Shimano was 130mm IIRC.

    Campag are really irritating on their compact chainsets - 110mm apart
    from one which is on a 112mm circle. Only reason is to lock you into
    their kit.
    Clive George, Jul 18, 2015
  4. icogs

    Mike Causer Guest

    I don't currently have any bikes with Campag chainsets to check, but two
    with Stronglight 122mm which is handy to switch rings between them. Anyway
    as the problem is with a 5+2 bike I think it's probably from the 1960s or
    1970s, it may be 151, 144, 135 or 116.

    You say that as if it's a bad thing. I have a Holdsworth that I would
    love to have in full Campag dress. W.F. Holdsworth were the UK importers
    for Campagnolo of course. And my Viking Severn Valley in the 1960s had a
    Campag Record drivetrain, purchased with the proceeds from my car cleaning
    round ;-)

    Mike Causer, Jul 18, 2015
  5. icogs

    Rob Morley Guest

    And almost certainly won't fit. You might find a TA ring the right
    size, but the price will probably be similar to Campag. Can you just
    put the ring on backwards to get some more use out of it? :)
    Rob Morley, Jul 18, 2015
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