Shimano BB un55 will work fine. 113mm (I think) is the most common spindle length for a triple crankset.
Edit: You already have a triple and a functioning BB, right? First get your new crankset and a crank puller and try the new crankset on the existing BB. If you're swapping a triple for a new triple, chances are it'll work. If the smallest ring doesn't clear the chainstays, measure your current spindle and buy a new BB with spindle that's longer.
Last edited by clengman; 10-13-14 at 06:01 PM.