Fat Bikes have evolved out of a need to ride on treacherous trail conditions. They work well in snow and sand. Their increase in tire size gives them additional traction, floatation and also works as suspension. Adaptrac works on fat bikes and allows them to change their tire pressure on the fly. This means when riding in heavy snow or sand you can be rolling at 7psi in seconds and then instantly back to 30psi for the road. The larger air volume does call for a larger CO2 tank.