The original look and design from the European originators of the sport. Also known in the 60's and 70's as a Skibob, this type of SkiBike has a low center of gravity and is designed to be ridden sitting down. It is generally used with footskis for additional balance & edging. 

Freestyle SkiBikes are a newer style that has emerged from the North American market that resemble Mountain Bikes. They are most often ridden without footskis, with a downhill Mountain Bike inspired riding technique. Like Mountain Bikes, Freestyle bikes can be ridden either standing up or sitting down and have footpegs or foot rests. Many models have fully adjustable front and rear suspensions. 

3-Ski SkiBikes are a trike design that have recently emerged in popularity. They use three skis in their design. One ski is forward connected to the steering handlebars while the rider stands on the rear two skis. They are ridden standing up and usually have front suspension.