I am not in the tire business & i have seen several tires like that
That is a what happens when your driving on a highway & somebody had dropped something on the road.
Typical Road Hazard around San Diego County & that is why no one wanted to touch it
I buy all my tires at Discount Tire & i pay extra for the Road Hazard warranty
Last year i was back in Connecticut, there are no Discount Tire stores there
Someone pointed out that i had a slightly low tire & the Firestone Tire store tech spotted a bulge on the inside of that tire.
I called my Brother in Law & he asked if i could drive to a friends tire store, i did & the tire had a 8" nail in it.
I needed another tire & all the other Michelin tires had maybe 10,000 miles on them
I ended up having to buy a new Perelli tire with the same tread type, because they didn't have my particular Michelin tire in stock & i needed to get back to San Diego ASAP.
When i returned to San Diego, i went to my local Discount Tire
I showed them the tire with the bulge & nail & they mounted a brand new Michelin tire on the rim with the Perelli tire on it & paid me the full price of the Perelli, including taxes.
I then paid for the road hazard warranty on the new Michelin & i was happy & went home to unpack my clothes