• I’ve got a surly midnight special with a gusset headset, currently I’ve got the standard steel fork on it, but I’ve just bought a carbon 1/8 1/5 fork to put on it.

    In my head that should just mean a new crown race ? Or at worst a new lower headset. But when I look at the details there’s no reference to 1/5 obviously that would be to easy, what da fuck does all this bollocks mean?


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  • EC = external cup
    44 = inside diameter of the headtube
    40,30 = inside diameter of the bearing. 40 for 1-1/2", 30 for 1-1/8"
    So presumably ec44/40,30 is a 1-1/2" lower cup to fit a 1-1/8" steerer so yes you would just need a new crown race, I think
    You don't normally see both diameters on one option

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