So, sorry I didn’t reply right away.
But I have now installed Konig Rewind 8 spokes on my ZStore XL Caliper and Rotor kit. These are 15 inch rims with 215/60 tires. Even with these there were clearance issues. I had to grind down the brake calipers a bit. The ridges of the caliper were scraping the wheel with about 2 mm of space making it impossible to seat and torque the wheels on. So in the caliper picture you can see 3 ridges. I used the grinder to smooth the closest one. It now sits properly and spins without scraping. I am planning to use 3 mm generic spacers to provide sufficient clearance. Does that seem alright?
Anyways, thanks to NewZed and jhm for helping. I was told the modification would not need a larger brake master nor brake balance adjustment. I am planning to check on both of those concerns. I think I need a new MC anyways.
Merry Christmas to all.