Would that be a negative shim? IS brakes mount on the wheel side of the fork tabs. Post mount have oval holes, but I'd imagine @root is already at the limit of that adjustment.
A bigger rotor and a suitable caliper mount adapter would be one way to get the caliper away from the spokes.
Not quite, the Spyres advantage is that both pads can be adjusted, meaning that you can space the caliper a bit further out with a washer and move the pads a little more to the right to compensate.
Would that be a negative shim? IS brakes mount on the wheel side of the fork tabs. Post mount have oval holes, but I'd imagine @root is already at the limit of that adjustment.
A bigger rotor and a suitable caliper mount adapter would be one way to get the caliper away from the spokes.