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  1. #1
    Special Lister
    Reputation: kjsayers's Avatar
    Join Date
    Jun 2008
    Posts
    324

    Saint BB and arms

    I am wanting to order a Saint M815 BB and crank arms not chainring. My question is can I use any chainring as long as the space between the bolts are the same? Example will all 104mm chainrings fit arms that are 104mm?

  2. #2
    Fat-tired Roadie
    Reputation: AndrwSwitch's Avatar
    Join Date
    Nov 2007
    Posts
    13,328
    No. Never assume. The bike industry exists to make compatibility headaches. You're probably fine, however.

    Where I've run into a problem is with some Shimano chainrings that have a lot of detailing on the spider-facing side of the ring and mismatched crank spider tabs.

    I've not run into that problem with other brands' chainrings. Not that it's impossible, of course. But if you have a look at the spider-facing side of the ring and it's pretty flat around the bolt hole, you're probably fine. Shimano's rings sometimes have a pretty distinct thinner area around the bolt hole and pretty distinct step not too far away.
    "Don't buy upgrades; ride up grades." -Eddy Merckx

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