Hollowtech bb 1x conversion chainline help

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  • Probably a dumb question but I'm new to hollowtech and 1x conversions

    Have some hollowtech cranks that are said to need a 48.5mm chainline, I'm putting them on an old 26 mtb for a 1x conversion.

    The chainline and spindle length of hollowtech confuses my small brain. Can someone break it down for an idiot.

    Does spindle length in hollowtech correlates more to what's attached to the cranks? So there isn't various sized spindle length hollowtech bbs like there is with square taper, that one would need to mess with to get the proper chainline?

  • 48.5mm

    What cranks are they?

  • On a Shimano Cx50 crankset I have the narrow-wide chainring on the inside of the outer ring, that puts the chain on the middle of the 10s cassette.

  • some random ebay chinese jobs, so not entirely sure how accurate that actually is tbf

  • https://www.lfgss.com/conversations/3689­58/#comment16226894

    These ones. Thought I'd try them as a bit of a joke so not a massive deal if I dont sort it out I guess.

  • Just fit it when it comes and see where the chain ends up in relation with the cassette.

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Hollowtech bb 1x conversion chainline help

Posted by Avatar for ojwithbits @ojwithbits