That was a great run through the canyon today, thank you to everyone who helped put it together.
Afterwards Pappy and I headed North, with me following, to reach I-25 via Magdalena. When we reached Socorro and were about to turn onto the freeway Pappy very fortunately stopped in a McDonalds car park, where it instantly became clear my car had a problem:
Pappy pumped it back up, only to reveal a deep cut in the center of the tread:
This must have happened in just the last mile or so, because it was deflating quickly and yet the rim had not shredded the tire.
Huge thanks to Pappy who in the interest of keeping us moving stepped in and had the spare mounted within minutes!
Looks like it's time for some proper all-terrain tires.