'COR' is a non-pneumatic tire design installed on self-driving cars for user safety. Since self-driving cars drive without a driver, it is necessary to use non-pneumatic tires to prevent accidents due to tire damage. Conventional non-pneumatic tires have a simple unidirectional design, which lacks structural stability and does not improve the vehicle's driving performance. 'COR' is designed to maximize structural stability and improve optimal driving performance in various environments by applying a special non-pneumatic tire design.