frame is Specialized carbon epic with, according to Spec: an integrated pipe billet bottom bracket ensure stiffness and efficiency.
I would like to replace the Shimano chainset by a Truvativ Noir that I've been informed is GXP format. I do not see any BB cups on the bike so it does not appear to be a case of simply swapping out the BB cups - so can it be done?
...... doncha hate it when some lucky googling gives the answers to a question you just posted!!! BB compatibilty
I leave this post as the info. I am sure will be of use to others.