Any CX clincher can be mounted on a narrow road rim, even MTB wide tires will stay on a 20mm rim fine. Difference is that a wider rim will make your tire footprint a bit wider too and hold more air volume inside the tire, help provide a bit more floatation/traction for when that is desireable. With the proliferation of 29er MTBs, there are now a lot more wide 700c rims available than several years back. If you have a barral adjuster inline somewhere with your brakes, adjusting pad clearance amounts to all of a 5 second tool-less operation.