Shimano BB mix/match

[henrypretz]

Maybe a dumb question.
I have a new CX70 crankset for my GT Grade. It currently sports FSA Omega cranks with Mega EXO BB. Will the Shimano crank/Mega EXO BB work together?
Here's another - I have a BB6600 in my parts box. Will this BB work better with the CX70 cranks?

Thanks
Henry

[kramnnim]

The FSA spindle seems to be slightly larger than Shimano...took an awful lot of effort to get it in to the Shimano BB. So the Shimano crank might be a little loose in the FSA BB? The 6600 should work great.

[CiclistiCliff]

There's a difference of .4 mm between FSA and Shimano. It's enough for it to 'work', but not recommended.

[henrypretz]

Thanks for taking the time, guys.
This place is the best.

Henry

[SpeedyChix]

Will add on another yes: go with the Shimano BB cups for that crank.