Rode 17 miles to work on limestone trails last November on my Rad Rover.  Couple of inches was too much for the stock Kenda tires.  Didn't feel comfortable at all on my stock setup. I did it just to say I rode to work in the snow. I don't plan on doing it again. Also, the upright position of the brake cable as it enters the brake caliper is problematic as the cable filled with water/limestone. Had to replace the cable.