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

Answer: Factory street tires are generally designed for a wide range of operating conditions on the street. The track will generate higher loads and more heat. There are street legal “track day” type tires or one can opt for some sticky track only rubber. For the rider that rides street plus occasional track days, I recommend finding a good set of used wheels, keep a set of track tires mounted up and simply swap wheels when headed to the track.