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  • Thinking of flipping a 6 bolt 130 OLN

    Definitely flip it and buy a new 135mm hub, 130mm disc hubs are hens' teeth🙂

    The chain line on a flipped rear hub is about 54mm, depending on which side you put the 5mm spacer add or subtract 2.5mm

  • Haha, unfortunately i had it wrong as this a boring old 135mm RS 505 hub.

    is about 54mm

    Ouch i was hoping to pair it with some Rotor 1X cranks that are around 44mm, doesn't sound like a good match to me. Would a 5800 crankset with a NW ring on the outer position and maybe a few shims work better? Chainline is listed as 43.5mm but i'm assuming that's measured between inner and outer?

    Would also need to think about securing it properly, pretty sure i have an old XT qr somewhere but maybe there's a steel bolt up skewer that isn't trash like the Halo etc?

  • Front disc hub will be cheap and work great, with chain line between 41-46mm ish depending on dishing and spacers used. Convert with new threaded axle and a selection of spacers.

  • 135mm RS 505 hub

    Then it's worse, about 56mm chain line from memory, though my great age means my memory is failing and I might be out by 2.5mm, most likely in your favour*

    As suggested, converting a front hub is a better solution and not hard. I favour the 15×110 boost hubs as the 46.5mm chain line works well with the ~47mm chain line of the big ring on a road double. A 9×100 or 20×110 spaced 5mm to the right gives the same chain line and near dishless build, but with slightly less flange spacing (but still better than the DS of a rear hub)

    *I was right about both the magnitude and sign of my memory failure. A 3mm thick 6-bolt sprocket on a 135mm rear hub gives a chain line of 54mm

  • Chainline is listed as 43.5mm but i'm assuming that's measured between inner and outer?

    Yes, the actual rings are ~±4mm from that

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