Kumho (121) Original Equipment T135/80R18 104MOVERVIEWThe T121 is a temporary/compact spare tire is an alternative tire vehicle manufacturer provides rather than a full-size spare tire. This allows space and a lower vehicle weight. The T121 is designed to help give drivers temporary mobility in the event of a cut, puncture, road hazard, accident or blowout, or any event that would cause a flat tire. The T121 is noticeably smaller in size and has a lower tread depth, which is why it is designed for temporary use only. Original Equipment tire Shallow tread depth For temporary use only