several months ago my left rear tire came off on an expressway leaving rim with about 1/2 inch of rubber left on rim. I replaced all 4 tires and purchased the mounted tire and rim as a spare. It fits in my P85 frunk perfectly—doesn’t have 2nd motor. Added 22mm socket for lug nuts and am getting jack so if I have a flat in future I or a local tow company can change tire for me to avoid waiting for Tesla road service dispatch who removed rim and mounted a loaner replacement mounted and inflated on rim. Hope not needed again but worth peace of mind.