Ski-Doo, Summit All Snowmobiles >>> Snowmobiles by Ski-Doo More details and ordering info. Powerful twin-cylinder Rotax? engines rocket you to the summit on the lightest, most maneuverable chassis in-class. Add a long mountain track - ranging from 136 to 151 inches - and you have the perfect machine for shredding the most remote bowls in the mountains. As if that weren't enough, the Summit also comes with the Digital Performance Management (DPM) system to accommodate changes in altitude and weather, keeping your sled running at peak performance up to 14,000 feet. User input on Summit by Ski-Doo: Be the first to submit input on this product Submit Input: Your Name: Write or Paste Input here: Upload picture:      Review Guidelines