• the chainline measurement isn't just the hub, it's also the BB width, most 135mm dropout ss bikes have a 50mm chainline, you'll just need a wider BB to make it work with the goldtech

    if the frame has 50mm chainline i assume this is with shortest bb length possible? otherwise he would need a shorter bb to get the 46.5mm chainline. or space out cog a few mm with spacers (not sure the max you could use?) or run the chainring on inside of crank spider.

    Buy a single speed disk hub such as the on-one, one (grammar!) then use a velo solo bolt on cog. I've done this and it gives me the same chain line fixed and free on a mtb that would not take a lesser chianline. (chain line is 50 mm for ref)

    it sound like he has a goldtec hub so seems a shame to waste it?

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