I find appreciable difference in the plane's ground handling and T/O
performance, so much so, that I now have a small foot pump to top off the
tires permanently in the baggage compartment.

One of those battery-powered ones is an absolute God-send at the hangar.
Ours cost about $50 bucks, and has a cigar lighter jack (for powering other
devices) in addition to a very high quality air pump.

We've found that the tires need to be aired up every two weeks or so. They
will lose 10% or more of their air pressure in that time.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"