drwelby wrote:
The SCS rear QR hub is supposed to be 135 spaced, with the drive-side flange and cassette moved 2.5mm inwards to match the chainline of a 130mm road hub:
You can see the disc mount remains in the same place. The special SCS hanger just moves the rear derailleur in 2.5mm to track the cassette but doesn't change the hub spacing.
The spacing from the disc mount to the end cap should be constant across all hub widths - that's why the disc mount floats out about an inch on wide tandem hubs:
So if your hub is making the disc hit the brake mount, there's two possibilities:
1) the end cap of the hub is wrong, but this should change the overall hub spacing.
2) the disc mount is too far inwards/crooked. This could happen on a welded bike, but this model is carbon and you would expect it to come out of the mold correctly aligned (unless the mount is bonded later)
If your correctly dished rear wheel is hitting the NDS chainstay, there's only one possibility: something's wrong with the frame.
If your rotor and rear wheel hit the NDS side of the frame, there's only one possibility: wrong end cap/missing space after the wheel was dished. But the wheel would be out of dish and your hub would be narrower.
Then the mystery of the 130 hub when it should be 135...
This is all too weird to diagnose over the internet, so let's move on: sure, you can throw a spacer on the left side and redish the wheel and as long as you can make everything fits, the bike should be fine. The only question is if you can put enough spacers in there and still get the hub to fit.
Also if you need 1mm of clearance at the rotor you can add a 1mm spacer, but to get 1mm extra at the tire you'll need 2mm of spacers.
Though here's another question: is there a recess on the inside of the left dropout that the axle fits into?