Any question answered...

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MrBaklava in reply to @Dammit

Why not? What do I need to get Ultegra 6700 cranks on a Systemsix?
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gbj_tester in reply to @Dammit

Shimano BB wrench

Or any other standard external BB cup tool, everybody makes one. It's worth getting the socket type e.g. this rather than the wrench type e.g. this
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Howard in reply to @Dammit

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.