Originally Posted by
shelbyfv
BSA indicates it's screwed in rather than press fit. It seems to come with spacers, fits either 68mm or 73mm bottom bracket shells. Those, AFAIK are the relevant specs. Don't know what those other numbers mean. Hopefully someone else can clarify.
GXP (the spindle interface) and BSA (the threading) are all you need to know. The spacers are for resolving chainline discrepancies, usually on mountain bikes that have a variety of rear axle standards now. Follow the instructions for use of the wavy washer and seals when reinserting the crank spindle.