Current Projects chat and miscellany

possible to have braze on Paul centerpulls set up where you could have the Racer set up for 650b and by switching in the Racer Mediums you can have 700c?

If you have the studs in a pretty narrow window, yes. Boss height is 334mm nominal for Racer/650B and 340mm nominal for Racer Medium/700C. Assuming the nominal size puts the pads in the middle of the adjustment slots, that's 334±7.5 and 340±5 (shorter slots on the Medium), and the overlap window would then be 335-341.5