I am in discussion with Park Tools about having a 752 reamer set reground to work with the BB92 standard.
I know PVD and some others are using this standard and want to be sure that I have the reamer ground to the correct size.
My understanding is that the standard is 41mm press fit cups. Shimano has not to my knowledge published specifications for the standard. Calvin at Park Tools measured some bottom brackets they had on hand for showing that a SRAM GXP was 41.04, a Shimano was 41.06 and a Race Face was 41.08.
Calvin thinks 40.95mm with tolerances of +0, -.02 will work for a nice tight fit.
I would hate to go through all the expense associated with this and end up with something too loose or too tight.
Before I pull the trigger and place my order can anyone let me know exactly what size they have used for custom ground reamers that support the BB92 standard?
The BB92 standard seems to be a good thing to avoid crimping and bending the hell out of the chainstays to fit wide tires on short chainstay 29ers. It seems the bike will be stiffer and stronger with less crimping and a shell that is supported at a wider point.