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Funnily enough, I think that Tarmac frame is OSBB, which is specie's BB30, so it probably has a converter to BSA in it, meaning if you took the whole lot out, converter and all, it would go in a BB30 SystemSix @mk1mark
Taking the converter out might not be a good idea tho :)
IIRC some SystemSix - the later ones - were not BB30, so it all depends.
Howard
Shimano BB wrench, and no.