32 will work, I never broke one touring off-road, so I don't think it should break on the road. I'm heavy.

I don't know your rim. If you are talking about the kind of road touring where you use 1.5" tires or lighter, then you have to be careful that the rims aren't too wide, over an inch say. Otherwise they will be too heavy and prone to puntures. I'm not saying they won't work, but that's about where I would start to bail.