One day, you'll see them out on the trail:

Here's what:
(from
http://www.imba.com/resources/land-protection/fat-bikes )
Quote:
Fat Bike Best Practices
Regarding equipment, what is the bare minimum I need to ride on snow?
Tires wider than 3.7 inches
Tire pressure less than 10 PSI
You will not leave a rut deeper than one inch in the snow
You are able to safely control your bike and ride in a straight line
You have permission to ride from the land manager
DO NOT RIDE, especially on groomed nordic and snowmobile trails, if you can't meet all of the requirements above.
I have tried one of those bikes a month ago on thick grass and was surprised how well it handled. As for winter, it's obvious that they are useless in deep snow. But I bet some folks will try them on the snow mobile trails. And in late winter, these things can handle the crusty snow of cold mornings.
Here's the advice given for such conditions:
Quote:
Best Practices for Riding on Snowmobile Trails
When riding on snowmobile trails, use a front white blinker and rear red blinker at all times. Wear reflective material on both the front and rear of your body.
Stay to the far right of the trail and yield to snowmobiles.
Know and obey the rules of your local land manager. Understand that some trails may be on private property and might not be open to alternative uses.
Be prepared. Winter travel in the backcountry requires carrying proper gear and dressing properly. Be self-sufficient!
Use extreme caution when riding at night. Be visible and always use lights.
Be friendly! Fat bikers are the newest users and the snowmobilers you encounter might not be welcoming. Be courteous and open to suggestions.
Help out by supporting your local snowmobile club.
Donate to trail grooming and maintenance efforts.