John is a professional welder with experience repairing and modifying Alaskan bush planes, so welding a bike from stainless steel tubing is no big trick for him. The bikes are quite light, considering the huge rims and tires. I believe he said 28.5 lbs.
John Evingson builds these bikes for off-road racing on snow. Events such as the Ididasport races in Alaska.
These custom made rims are no longer in production, but he's looking for a new supplier. He uses two inner tubes in each tire.
The black baggy things on the handlebars are a descendant of the old motorcycle HippoHands. They allow you to ride at very low temps, wearing gloves instead of mittens.