Rear Big brake help on CQ

[konradwax]

I have s2 rear hubs. Upgrading to larger rear brake and ran into an issue. So here is what I have.

Rear D2 s8 brake carrier
Rear B5 s4 brake caliper
Rear 8E0-615-310 brake discs

I'm guessing I ordered the wrong rotor due to the fact that the hat spacing is too deep. So my question is what rotors do I need?

[Colesy]

A8 discs turned down by 20mm is what you need. Full details are on S2 central

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[konradwax]

8E0615301P Zimmermann Coat Z Disc Brake Rotor; Rear ; Vented 280x22mm
Item# 8E0615301P

this is what I have

[konradwax]

ok, I see what I did. I need to get 300x22 rotor and machine it down to 280 because it has the right hat spacing.

[PRY4SNO]

Or you can swap rear hubs to b5a4q rear hubs to bolt up b5s4 rear rotors and save current & future machining costs.