My wife is wanting a flat bar commuter to go the store, library, around town etc. She doesn't care for a bike with a triple front like a Trek FX and wants single ring up front so I thought about putting something together with a CX frame. My question though is whether I can run something like Shimano Zee on a CX frame? This is basically what I was thinking about:

Planet-X Kaffenback disc frame and fork (has 135mm rear hub spacing)
Shimano Zee 68mm english crankset 36T
Shimano Zee wide ratio rear derailleur
Shimano 11-32 cassette
Zee rear shifter
Avid BB5 disc brakes
Mavic Crossride Disc 29" wheelset (QR version for front and rear)
http://www.competitivecyclist.com/ma...-29in-wheelset
Schwalbe Marathon Plus 32c tires