You can purchase a set of replacement sensors and have them installed in your extra set of wheel assemblies. When the extra set of wheel assemblies are mounted to the vehicle, the TPMS sensors may have to be relearned to the vehicle’s computer. Also, when the original set of wheel assemblies are reinstalled on the vehicle, the original sensors will need to be relearned to the vehicle’s computer. Some aftermarket sensors can be cloned to the original sensors eliminating the need to relearn the sensors each time the wheel assembly’s are changed.