Abstract: Shock mount for protective structure for tractors, including an upstanding post affixed to the tractor to protect the operator in the event that the tractor rolls over or in the event something falls on the tractor. A post mounting member is affixed with the tractor chassis, and an assembly of an elastomer insert and a bushing and a bolt interconnect the post and the chassis, and actually the elastomer insert and the bushing are presented in duplicate in the assembly. The inserts have a tapered interior opening, and the bushing is received within the opening to urge the insert outwardly into snug fit with the mounting member.