I went out last sunday for a romp around tolt hill. Put the fatty tires on and broke some trails through about a foot of snow out there. Temp was below 30 degrees as the water in my camel bak froze and became useless dead weight. Fingers felt like they were gonna fall off. Note: wear warm snow gloves when biking in snow. A lot of branches weighed down with snow crossed the trails which I either blasted through or walked around. Crossed a frozen over creek which collapsed under my weight and suddenly I was in a half foot or so of water. Got water up in my front disc caliper and the brake froze up. Thawed itself out on a snowy downhill when it suddenly began to grip again the front tire locked and I slid off the trail a few feet. First time breaking xc trails in the snow. It was hard work. Breaking thru snow is sorta like riding in loose deep gravel. It would have been more fun if my fingers hadnt been aching.