My Wheels MFG BB (PF30 to Shimano) uses regular ~44mm wrenches like he original Hollowtech II, Campy UT, etc. BBT-9 size.
This says 44mm...
http://wheelsmfg.com/tech/PDF/PF30-O...STRUCTIONS.pdf
The 48.5mm wrenches are for the PF30 BBs that do not convert down to Shimano/GXP.