The Timbersled Snowbike was created by adding a kit built by Timbersled to an existing dirt bike. The one shown above is the ST kit on a KTM 450 XC.
While this is a specialized setup, watching Reagan Sieg ripping over the Canadian backcountry makes me want a turn behind the handlebars in a bad way. Check out the video below.
The ST (Short Track) kit is the most popular Timbersled snow bike conversion kit, with “the best maneuverability and control for mountain riding and the best power to traction ratio,” the company notes. It can utilize the power of a dirt bike as small as 250cc.
The conversion is not cheap, at $5,000+, but for motorheads who need every possible toy, it sure does look fun. See more at the Timbersled site.