Want to ride in powder (snow) or sand? What do you do with your dirt bike? With the SwitchTraxx Conversion Kit you can ride your bike pretty much anywhere "These bikes offer many advantages over snowmobiles, including improved seating position, better suspension, lighter weight, less overall cost, YEAR-ROUND USE, and much better fuel economy. Did we mention YEAR-ROUND USE? Will they replace the snowmobile? No, not for everyone, but they do offer a practical alternative."
This is a lot like the KTRAK, which lets you convert your mountain bike.