This thing is a trip – it’s Mike Curiak’s prototype bike. In 2005, Curiak won the 350-mile Iditarod Trail Invitational setting a new course record in the process. This bike was built to help him in the extreme endurance race.
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The downtube is sealed and it can hold up to 1.5 liters of white gas. The tube can be pressurized via a Schrader valve and then a camp stove can be run directly off the bike! He used it to cook food and melt snow for water.
Pretty interesting.