• Does seem close. Can you contact BLB and ask them if their frame can use a 42mm chainline? If it can't then doesn't sound like much of a 'track' frame as 42mm is pretty standard.

    The underlying problem is that the chainset is intended for MTB isn't it? Much the same as say a Middleburn Uno which I was thinking of, would require a very small BB axle to get anywhere near the correct chainline as was designed for a 52 or whatever an MTB is.

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