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gbj_tester
@Jon.
I'm trying to copy stack and reach over from an existing frame to a hypothetical frame. I think I'm making this out to be far more complicated than it is.
Existing frame has a 170mm headtube with an integrated headset with a stack of 16.7mm.
Hypothetical frame has an undecided headtube length with a standard external headset with a stack of 36.6mm.
Is it simply a case of adding headset stack to headtube length (from my existing frame), then subtract my headset stack (from hypothetical frame) from this to give hypothetical headtube length?
i.e.
170+16.7 = 186.7
186.7-36.6 = 150.1mm
Differences in upper and lower stack between headsets shouldn't make any difference? and there should be no effect on overall reach here?