Just a thought...
Remember these 5.10 Shinko's and Kenda's we are putting on the front are really intended to be rear tires on other bikes. Often much heavier dual sports than the TW.
The Big Boy on my bike was completely down last month. Didn't show any movement on the gauge, and aired up fine.
I knew it was low because I could feel a bit of wobble when turning on pavement, but I didn't realize it was below 5.