Hello dear motor-talker. I bought a used car from a dealer a few days ago. On top are 4*Michelin summer tires (225/40 ZR18, DOT: 3607). The tire on the back right was damaged by the 1st vehicle holder by curb. The damage is on the outside of the tire. When buying the tire, the boss promised me that you can drive definitely fast. The tire still has 7mm professional. He also thinks that you can drive it for at least 2 years. But a colleague yesterday I looked at the damage and suggested that I change the rear two tires. Could you please look at the pictures and give me some suggestions? Thank you very much!