KH/Onza question

I am buying a new muni soon, and I am looking at the KH/Onza hub/crankset. I was wondering if I would have to buy a KH frame to go with the 42 mm bearings. Could I use different sized bearings?

Another quick question. Are the Odyssey Jim Cielencki’s on UDC the plastic ones or the aluminum ones?

I use the kh/onza hub and cranks (42mm od) and i use a bedford frame( 40mm od) and it fits no problem

OK, excellent, as that’s the frame I want to get.