As above, SRAM gxp cranks need an adaptor to fit a regular hope ht2 bb (it’s a top hat reducer washer)
Not sure if you can use this adaptor with other ht2 bb’s … Would make sense but don’t know.
Buy a gxp compatible bb from SRAM or one of the compatibles from token etc.
Anything saying ‘shimano compatible’ or ‘ht2’ will not fit. The crank axle will be too narrow.
I heard the ‘Gxp bb’s are cheese’ thing but I have a lowly black one that came with an x5 crank that’s still fine a year on…
Afaik Inbreds are a 68mm bb (o-o website will say or use a ruler…) but this doesn’t matter until you install (different spacer pattern, instructions will be with bb). Just don’t buy 83mm or ht2… 🙂