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  • On the bottom of 1" steerer tubes, the crown ring/baseplate bit I understand are standard diameters, 27.0mm or 26.4mm ... Should I be worried if my headset manual seems to think that 26.5 is what it wants? My new fork with an ally steerer seems to have a 27mm mount, so I'm about to ask an LBS to ream it. Will I die if the baseplate ends up 0.1mm looser?

  • Should I be worried if my headset manual seems to think that 26.5 is what it wants?

    The steerer should be 26.5mm at the crown to give the correct interference fit with a 26.4mm crown race

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