To all you 29er's out there!

Quick question,
I'm converting my tricross from SSCX to a kind of lightweight singlespeed 29er lowpro (V-brakes, fatter tyres, wide flat bars).

What max size tyre would you recommend on an open pro rim? I'd like to think that I can go up to 2" but maybe it means too much side roll.

Will a tricross take 2" ?

I replace the rims if you want more than 32mm. OPs are nice to have in the parts box, or easily sold. Even a cheap wide rim will be better for your use. Seems a waste.