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  1. #1
    Senior Member
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    Old Trials Bike Question

    Hello,

    I am getting an old Ibis trials comp from the eighties. Currently it has a Sugino trials crankset, with a 24t chainring. I had a few questions for people regarding the cranks, compatibility and chainline:

    Can the chainwheel be swapped? Is it replaceable with a non Sugino wheel, like modern BMX single bolt?

    The frame has 110mm/3/8" spacing, like BMX. What is the standard chainline? What is probably the max chainring size that can be used without hitting the chainstays? If I wanted to throw an old 110/74 BCD crankset on instead, would the inner ring line up?


    Thank!

  2. #2
    use your best eye kenhill3's Avatar
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    Mar 2006
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    '75 Bertin, '93 Parkpre Team 925, '04 Kona King Kikapu, '05 Bianchi Vigorelli
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    Here's a bump for ya.

    I can't personally help you at all, but try also posting this question on the Bike Mechanics sub-forum.

    Good luck.
    "I tell you, We are here on earth to fart around, and don't let anybody tell you any different." - Kurt Vonnegut jr.

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