Help on GXP bottom bracket size.

[Shortsocks]

Hey Folks. Noob Question.

So I need to change out my Bottom Bracket. I have a Italian Threaded GXP, but I don't know if I need a 68 or 70mm. And On inspection of BB all that I can see is this "33-10" on it.

Ive been following on ebay: And it says "42-13", So Im guessing its not going to fit? Any help or points in the right direction would be helpful.

THanks in Advance. :)

[cmbicycles]

the "far superior" Italian thread is for a 70mm shell, English is 68

[Shortsocks]

the "far superior" Italian thread is for a 70mm shell, English is 68

wait....do you work for team sky? :banana:

[cmbicycles]

No, but I did stay at a holiday inn express. ;)