I can't help with checking while on the road but at home I use the procedure below.

The HD tire gauge part number 75137-98B has a 90° end so it's just a quick press and release on the valve stem and the gauge holds the reading.

To add air I use my 90° air chuck to add and then check again with the gauge.

I have not needed to check them while on the road but if I did go on a trip I would pack the HD gauge in the saddle bags my Slime portable pump to add air.

http://www.slime.com/product/111/Pow...%2340001).html

 

Like the idea of the powered portable pump. Have to get me one of those.

 

Thanks a ton for all of the responses. Some really great ideas. And I love the Motorcycle Jack....

Thanks again,
jack