In article <1136823001.086279.133150@g43g2000cwa.googlegroups .com>,
spacetrax@wi.rr.com says...
> While at a friends house over the weekend - he commented - your front
> tires look low - nah said I - just checked them - got out my ancient
> gauge - stick with plastic bit that is pushed out the end- 29# it sez -
> yep low it is I said. He whipped out a digital gauge and said check it
> with this - 24# it sez.
>
> Being off 5# is way too much. I suppose the round dial gauges are
> better but this thing seems to be very accurate - bought one and got
> the identical readings 31.5 as on my friends digital gauge. This one
> is called Monkey Grip - has a permanent but replaceable batteries and
> is less than $10.
>
> Not affiliated with any auto parts products at all but have ruined some
> tires by running them under inflated.
>
>

I have a Accutire MS-4020 digital tire gauge (approx. $15 to $20), and
two Accu-Gage analog dial units - an RS60X and a RH60X ($13 and $16
respectively). Both the Accu-Gage gauges correlate exactly on measured
pressure. However, both read exactly 2 pounds lower than the Accutire
digital gauge. So, which one is correct - that's a good question. Just
because a gauge's readout is digital, doesn't mean that the actual
pressure "measuring" is more correct. I wish I had a "reference
standard" to compare these against.