In to process of putting an XX1 drivetrain onto an old Specialized SWorks enduro. The Shell is 73.2mm and the BB is for 68 with spacers and 73 without (Origin ceramic for SRAM). I'm old school, so these BB's are new to me lol. The MRP guide is a bb mount with a width of 1.5mm. Do I need to face off 1.5mm or will it be fine? I noticed there's two 2.5mm spacers with the Origin 8 along with a couple of .5mm steel washers. No idea what those are for (the .5mm, the 2.5 are obvious).
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