Browse Ski-doo Snowmobiles. For those needing to explore winter beyond the daily tasks, the Expedition Xtreme - now on the REV Gen4 platform - brings rugged off-trail ability and powerful 850 E-TEC performance exceeding expectations of what a sport-utility snowmobile can be. About: Ski-doo Snowmobiles. SnowmobileTrader.com always has the largest selection of New or Used Ski-doo Snowmobiles for sale anywhere. For those needing to explore winter beyond the daily tasks, the Expedition Xtreme - based on the REV Gen4 platform - brings rugged off-trail ability and powerful 850 E-TEC performance exceeding expectations of what a sport-utility snowmobile can be. For those needing to explore winter beyond the daily tasks, the Expedition Xtreme - now on the REV Gen4 platform - brings rugged off-trail ability and powerful 850 E-TEC performance exceeding expectations of what a sport-utility snowmobile can be. Sled: 2019 BCxrs 850, 2020 Expedition xtreme Posted 15 October 2019 - 07:44 PM I'm impatiently waiting for my spring order expedition extreme to arrive, in the meantime I am going thru my backup 2019 Backcountry XRS nose to tail and making sure it is ready to roll in the event I … View our entire inventory of New or Used Ski-doo Snowmobiles.