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That could work. The chainring already has small recesses for the chainring bolts on one side. If I could have these widened to accept the spider I think I'll be good.
It's a Gebhardt GXP Chainring.Edit: Or I could just get another crankset without chainring that has a proper chainline. Anyone know of a GXP/Hollowtech Crankset with 130mm BCD and 165mm length that has a proper 42mm chainline? I know of the Shimano Alfine crankset, but sadly it's not availible in 165mm
Murphy's_Law
Inverse shim or get a CNC machinist to cut 1.5mm recesses into your thicker chainring.