T47x92mm BB: We chose T47 as it resolves issues with PF92.   A 92mm shell allows the chainstays to be wider, providing more tyre clearance.  92mm also means that the chainstays can be welded wider on the frame, making the bottom braket area stiffer for belt drive use. 

This might look like another bottom bracket standard, however this is versatile and backward compatible.  FSA and others do adaptors with their versions of T47 and it is available in SRAMs DUB. Wheels MFG do a T47x24mm INBOARD BB which works with Shimano and Middleburn chainsets.