SnowBike, SkiBike or SkiBob

www.snowbike.com
www.koskisnowsports.net/


see also,
www.ski-bike.org
www.skibike.net/History.htm
www.americanski-bike.org


vintage footage,
www.youtube.com/watch?v=6torwnOULDU


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www.grasski.biz