Earlier Miche Primato Crankset BB standard

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  • Hey all,

    Got an earlier Miche Primato Crankset, the one with the slightly different BCD and the older logo,

    Would I be right that this is an ISO taper rather than the JIS with the current ones?

    I have a 107mm Miche JIS (current) BB that it doesnt seem to go too far onto, so that could be an ISO?

    For typical chainline what width should I go for with these cranks? Cheers!

  • They were ISO until a few years ago so that's what you want, I ran with a Centaur 111mm one with a Goldtec fixed rear hub and the chainline was fine. You can probably find a Tifosi one for about half the price of that.

  • Did you solve this issue? I’ve been using the same cranks with a jis bottom bracket for a while now (including on the track last night in fact) and it’s fine. I think it’s 103mm length BB but I’d have to double check that. It gives a chainline pretty close to 42mm.

    There’s loads of conflicting info on iso vs jis tapers on the inter webs, but the essential difference is length of tapered section. You just need to allow for the chainline moving a small amount.

    https://www.lfgss.com/comments/8756147/

    I do have a miche iso BB (with adjustable chainline) somewhere - I’d offer it to you but I seem to remember it’s not that smooth.

  • We have been running miche cranks on 107mm iso bbs at work for 7 years so pretty sure that predates the change in taper and they all seem to end up with the right chainline.

    They have all been the 144bcd ones though, not the 130 ones.

  • Out of interest, assuming those are like mine and the chainring bolt screw directly in to the cranks, you ever had them strip? Just done that to mine and wondered if I just need to drill out wide enough to use the chainring bolts as normal.

  • Nah ours have all had normal chainring nuts and bolts I’m afraid.

  • Ah, maybe yours are all a bit newer then. Seems like a pretty stoopid design - not surprised they changed it on the later ones

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Earlier Miche Primato Crankset BB standard

Posted by Avatar for ejtrent @ejtrent

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