• Without wanting to pour more petrol on this topic, I can only speak from my own experience. When doing my first build, I naively bought a shimano 107mm bb for a Primato crank and the chain line was way out. After conceding to buying the (supposedly inferior) miche 107mm bb instead, the difference was massively noticeable to the point of the chainline being near perfect, hence my original opinion that the two tapers are different.

    I now find myself trawling the topic again as a new frame means I need a wider bb and am looking for a replacement? Do miche still do the 110mm version, or would I have to go down the campy veloce route? Are there any other alternatives, other than Phil?

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