I was just waiting for someone to ask me that.
I have had many people asking the same thing. All I can say is, The right tyre is flat. It is difficult to tell with all the ashes surrounding it. And yes, my reference photo had a similar attribute. I know most would wonder why the right tyre did not get burnt to a crisp like the left tyre...In most cases depending on the degree of the fire and where it was most intense. I have seen photos with similar attributes. Here were some reference photos, that inspired me. Hope it helps:
There is your answer. Not everything one thinks, is.