Originally Posted by
banerjek
I'm not a fan of such rigid formulas. The actual tire as well as expected riding conditions weighs into what I choose.
Many people overinflate their tires which doesn't help speed, traction, or ride quality. But riding too soft is also no good.
The chart is just a starting point, but you have to start somewhere. Maybe lower the pressure a little on wet roads. Increase a little on very smooth roads. If roads are very rough, I would go for a wider tire instead.