Tires torn inside/broken, keeps the air (photos)

I don’t ask if and how far/fast I can still drive with it … I’d rather know how that happened/what can cause such damage Yesterday I drove 200+ with it I noticed only a slight imbalance and I assumed a lack of force weight. Well, more luck than reason … [EDIT] Achso … the data on the tyres: DUNLOP Sport Maxx RT 235/45R18 95Y XL DOT4013 mileage about 30,000km