The current zonda rims are 17mm inside width. Previously 15mm. I have a set on both of my bikes. They work great with 25mm tires, but will easily accommodate 28mm. Weighing in the 135-140 pound range, I don't need 28mm and it's questionable whether the diameter would clear the frame of a Conago C-RS. Tubeless has too many problems to interest me. I've ridden 6200 miles now without a flat, so my tubed tires - michelin power endurance - are working well.
As for the hub design, you can criticize all you want, but they are trouble free and the same free hub works for 9-12 speed. I have all 12 speed. Like usual, shimano will catch up 4 years later, but like with 11 speed, their hubs will be redesigned again (think microspline this time). Your old wheels will be obsolete.
Campy wheels can be had with Shimano 10/11 and the new SRAM XDR free hub. To get the XDR, you either have to buy the Fulcrum brand wheel or a free hub replacement from Fulcrum.
Last edited by DaveSSS; 03-28-20 at 10:01 AM.