I am (attempting) to install a Gamut P20 on my 5.5 and don't know whether to remove the 2.5mm bottom bracket spacer (shimano XT Cranks). The Gamut boomerang is inset where the bb cup fits in it and it seems like the spacer fits in the inset. But I don't know if that leaves enough threads to grip into the frame. The bb shell is 73mm.
What's the deal? Spacer or no spacer?
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