True for hollowtech 2 mtb BB, the road one has no spacers for a 68mm shell. GXP has no spacers if running road cranks as it'll be on 68mm shell, for MTB cranks you use both spacers on 68mm shell and none on 73mm as the axles are a bit longer.
If anything, my Cannondale Hollowgram vs BSA30 bodges are simpler than this.
Nah, it's easy, no spacers for road, no spacers for 73mm mtb, both spacers for the only one left.
@Emyr started
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True for hollowtech 2 mtb BB, the road one has no spacers for a 68mm shell. GXP has no spacers if running road cranks as it'll be on 68mm shell, for MTB cranks you use both spacers on 68mm shell and none on 73mm as the axles are a bit longer.