This is a super top secret underground hardcore mountain bike race.
CRN is a number system in Canada in which the number is issued by each province/territory of Canada to the design of pressure-containing equipment. This numbering system recognizes that design has been approved and registered for use under that province/territory. All boilers, pressure vessels, piping, tracing, hoses, and industrial instrumentation fall under this requirement. Know more about CRN registration and JMengineering.ca