Due for a production run in early 2007 (priced at a reasonable $400 for the track and $140 for the ski), the Ktrak is apparently very easy to install and ride, and adds only 5-pounds to the ...

The result is a mean-looking half-track quad bike, and frankly, we’re here for it. While the resulting vehicle doesn’t quite have the agility of a normal sports quad, it nonetheless grips up ...

This half-bike actually looks more like a third of a bike, and it pedals the streets and carries and stores easily thanks to those compact dimensions. SUBSCRIBE. LOG IN. HOME. SCIENCE.

They also made a tracked bike, the Kettenkrad. Meanwhile, the allied force mainly relied on the M3 and M5 half-track. It was an American-built vehicle, but we're pretty sure the British got some too.