allowed on plowed roads, exploring what could be new terrain-- >> setting up his shot in edwards, frank mitchual will be the first-- mitchell will tell you the bike business is hand in winter. >> the tires a huge. >> the cycling business is seeing a new spin year-round. >> becoming more main stream and a lot are riding them all the time. >> with prices dropping and more clipping in to ride snowy trails on the beefed up bikes. >> a lot that is different on the whole bike. >> reporter: another big difference are the tires, compared to a road bike, a fat bike tire can be up to 5 times bigger, which, on the snow, helps a lot. but riders need a hard-packed trail before they can go anywhere. >> there is a limit to how much >> which is why there is not a lot of places to ride in the winter. u.s. forest service only allows these bikes on plowed roads to avoid conflicts with wildlife. >> the bike trails in the summer time are closed. >> which means there are times when frank finds himself riding up a mountain only to then roll down along some nicely groom ski run for fun. >> the last 1/4 mile or 1/2 mile