Why is running factory street tire pressure a mistake on a track day or aggressive canyon ride?

Answer:: “Because your tires get hot. On the street, 36 to 42 psi keeps the tire cool and lasting a long time. But when you start pushing hard in the canyons or on a track, that air expands. If you start high, you end up with a rock-hard tire that has zero contact patch. You’ll slide right off the road. You have to drop that pressure so the tire can actually grow into the grip. If you don’t know the difference, you shouldn’t be pushing that hard.”