my mtb it kitted out with 2.4 (front) and 2.2 on the back (Continental Xking) 29" tyres. That's about as wide as i can go given my forks and chainstays. Except

my mtb it kitted out with 2.4 (front) and 2.2 on the back (Continental Xking) 29" tyres. That's about as wide as i can go given my forks and chainstays. Except for ice-covered patches, is this a sane rig to commute in the snow? Second, accumulated snow from the plows pretty much buries the bike lanes, no? anyone have experience whether cars reasonable about sharing more of the road?