So without knowing the specific dimensions of the 2012/2013 Sram Red crankset options, "COMPATIBILITY ISSUES" in BBright frames are still up in the air. Also, Sram has "almost" forced people that were looking to only upgrade their crankset or FD almost impossible because of the new "Yaw" technology, chainring design and shifters.
Here are my guesses:
Currently the only Sram compatible cranks with BBright are the S900 BB30/S950 BB30/S975 Powermeters. This is due to the axle being long enough to fit BBright's 79mm BB shell and accomodate the required spacers and wavy spring washer. S900 (first pic), S975 Quarq powermeter (below)
Sram has not specified whether or not the BB30 option of the new 2012/13 crankset will be like its last Sram Red BB30 crankset, which was not compatible with BBright due to the axle not being long enough. There appears to be two different cranks, the 2012/13 GXP (first pic) Sram Red with the non-drive side arm having the nut for final torque.
Then, we have this other crankset (just above) which I would assume its the BB30 option (above pic) with the nut for final torque on the drive side in the center of the spider and the axle attached to the non-drive side. By the way, this is how the S900 BB30 works.
The only thing we don't know is whether the axle on the future Sram Red 2012/13 BB30 crankset will be long enough (like the S900 BB30) in order to fit natively into a BBright frame with the spacers and wavy/spring washer. If the axle is long enough, then this new 2012/13 Sram Red crank will be a good BBright upgrade, except the problem then lies with marginal shifting compatibility due to the crank/chainrings working best with the "Yaw FD" and new 2012/13 Sram shifters. If the axle is not long enough, then only the new 2012/13 Sram Red Quarq Powermeter is natively compatible with BBright frames using a PressFit30 BB along with spacers and wavy spring/washer, however, the same problem comes up with front shifting given the crank is optimized with the new "Yaw FD" and 2012/13 shifters. Without knowing all the specifics, it seems to me that Sram has developed this new group in a very clever way. You can't really take advantage of the revised front shifting unless you go with the new crank/FD/shifters. Furthermore, if only the Red/Quarq powermeter works natively with BBright because of a longer axle, then you are hooked for $2045. GXP adapters, I would assume work with the new GXP crank, but the same front shifting dilemma arises.
Below is the data from the Quarq website regarding the new 2012/13 Sram Red Quarq powermeter:
The SRAM RED Quarq power meter has been designed and integrated into the RED group set. It is only compatible with 2012 SRAM RED chainrings and must be combined with the 2012 SRAM RED Yaw™ front derailleur and shifters. It uses existing SRAM RED GXP and BB30 bottom brackets.
- 53/39 and 50/34
- 170mm, 172.5mm, 175mm and 177mm
- GXP (fits GXP, Press Fit GXP) and BB30 (fits BB30, Press Fit 30, BBright) <---------- "IMPORTANT"
Availability and Price
53/39 GXP - April 2012
50/34 GXP, 53/39 BB30 and 50/34 BB30 - May 2012
MSRP: GXP $1995, BB30 $2045
Sorry for the long post everyone... please add or correct me if you have some extra data...