Thinking about a new crankset, I've been using a Shimano HTII for a few years, but looking around at new cranksets there seems to be a few new "standards" around.
Namely GXP and BB30 seem to figure strongly.
So, does the frame need to be prepared in any special way to use these or is it simply a case of removing the old cranks and BB and sticking the new ones in.
Are there any advantages/disadvantage of any of these systems or should I stick with the big S?
Cheers.

