Here's a link to a great tire gauge I found that allows the tire to be inflated and pressure checked all at once. I bought it specifically for a hard to reach motorcycle tire but liked it so much I got one for my "Box" too!

http://www.getagauge.com/Tire-Gauges...age-EZ-Air.cfm

 

That is a good one.. the best ... ehh... look at internal gauges ... the read the air pressure from the inside of the tire/wheel and send the reading back to the handheld... They are way over priced.. but so worth it.. and its fun to look and see how the roads you ride on affect tire pressure..