Sorry I got confused on the cranks, the frame needs BB92 bottom bracket. There are so many standards that it's really confusing! not sure what you call PF92 cranks. A BB92 BB takes any standard crankset (the same as BSA 68 and 73 mm), it's just that with BB92 the bearings are inside the frame when they are outside for 68/73mm BB.
Then, I'd say that you will not want to use regular 29" tires on such a frame. Don't entertain this possibility. Once you'll get into the + size you'll just stick to it, trust me. Pick whatever rims width you want but not for such a wrong reason.
For your reference, the Trek Stache 9.8 uses wide rims: 41mm internal 46mm external.