You won't be able to float on deep snow with any bike tires, unless there is a frozen crust. What you do get from very,very, wide tires is more work pushing them through the snow. In hard packed snow from cars, studded tires grab extremely well. When you get to 6" deep snow your pedals go down into the snow a little. It's a lot of work to go very far. Over 6" is so much work it's not worth it unless you want a work out. It also depends on how sticky the snow is, fresh powder is much less work than sticky snow. Wider tires do handle a lot better and low psi is a big help. 25psi in 2.1 tires is great on slippery snow. If there is no ice for the studs to grab studs don't help in the snow.