disc size does not matter.

Biggest mistake people make is trying to bleed them in position on the hub.

They need undoing and swinging round so the bleed nipple is uppermost at the top.

We have a 4 pot kit with a 2 piece bell and rotor that fits under S1 alloys but as its all new components its priced around £650

Not your DIY 2nd hand market prices though, but everything is new so it still works without being siezed up all the time lol