it's weird
 

setting your tire pressures in the 20's

is that the spec for the tires?

does that pressure allow them to heat up and fill out the tread properly?

Did you ever think that you would directly experience the inverse square rule in automobiles? Half the car being four times the fun? :D

Too funny. Remember that friend with the Bentley that I mentioned? Car calls for tire pressues to be set at 22 or 24 or something. The ride is noticeably better when the pressure is down to where the manufacturer suggests. It chews through tires though.