Segal's law is an adage that states: "A man with a watch knows what time it is. A man with two watches is never sure."
I guess the same can be said about tire pressure gauges. I check my psi once a week normally (usually Saturday morning before my ride). I've been experimenting with psi. I decided to go 32psi front & 36psi rear. I'll slowly work my way down 1 psi per tire to see if there will be any difference I can feel.
Here's what I found.
Rear:
Rear with dollar store gauge:
Front:
Front with dollar store gauge: