A 320mm disk with a 4 piston caliper should provide same or higher breaking power as stock dual 298, dual caliper setup.

I'm thinking about it, since I have a 21" /single disk wheel laying around and I want a second set of tyres with knobbies, XTZ OEM wheels are way too expensive, you save weight too.

Anyway, I'm not going to do it in a very near future.

have fun,

j.