Hope This Helps: Chalk Test for Tire Pressure

[cervelo15]

Never judge a tires proper inflation by the sidewall bulge. Different tires have different thickness sidewalls. Some will bulge more than others, even at proper air pressure.

Totally agree. That’s why I went by the numbers and ride comfort and monitoring treadwear patterns.

 

[BilletMotoRam]

40 psi all around nice even wear on 275/55-20