This is my setup for the CPP modular with the Z51 PBR sliders for 13 1/2" rotors. It required spot machining the spindles as the CPP spindles are only faced on one side and my dual sandwiched bracket and spacer setup needed flat parallel surfaces on both sides. A lot of this has to do with the increased offset distance my custom hubs and pin mount adapters needed. It pushed the caliper too far out from the spindle to deal with with spacers on brackets on one side only. I was worried I would introduce a lot of caliper shudder if not outright failure of the casting. These were custom made for me (along with custom milled hubs) by Kore3. Oh and they do clear an 18" wheel, well mine anyway, but only by about 1/8th of an inch.
