Was filling up my tires last night with my air compressor. I use a guage that connects to the air hose which was purchased from Harbor Freight. Filled up to 50 lbs, then checked with another guage I keep in my truck. It read 45 psi. Can anyone suggest an accurate tire pressure guage?

I use the Moroso 89570. It's not cheap, but it's accurate. Bruce

I wouldn't expect anything purchased at Harbor Freight to be accurate.

I have found NAPA tire gauges to be very good. I have a tire gauge in the glovebox of each vehicle... so that even if the gauges are not quite exactly matching each other, at least all the tires on a vehicle are being checked by one gauge and the tires will be evenly filled.

For $12.95, Camping World has one of the best tire gauges I have ever owned. I have a digital gauge from Snap-On that cost 4 times as much and it has never worked as well as my budget friendly Camping World gauge!

The one I have that is attached to hose from Harbor ft is always right with the TPMS......TPMS can have 2% error......

Accurate Tire Guage | Good Sam Community

noteven
Explorer III
Jul 11, 2014
Tvov wrote:
720Deere wrote:
06Fargo wrote:
dave54 wrote:
06Fargo wrote:
I have 3 tire gauges that don't agree with each other - 5 psi difference. I've been meaning to take them to my local tire shop and have them checked.

How do you know the local tire shop gauge is correct?

Due to RV people inflating their tires to MAX sidewall psi all the time, Transport Canada requires tire shops to have accurate gauges so MAX psi is never exceeded. So it's a good place to check your own tire gauges.

Uh oh, I hope you never check your tire pressure after a long highway run in the summer! The result may give you a heart attack.

I hope (and assume) that people know that "max" pressure on most LT tires means cold temperature, before tires warm up from travel. Easiest thing is to just check tire pressure in the morning.

Yes MAX cold pressure. What is a puzzle is what ambient temp is "cold inflation" measured at? -25F like on a "chilly" mornin' half the year here? :h
Tvov
Explorer II
Jul 11, 2014
720Deere wrote:
06Fargo wrote:
dave54 wrote:
06Fargo wrote:
I have 3 tire gauges that don't agree with each other - 5 psi difference. I've been meaning to take them to my local tire shop and have them checked.

How do you know the local tire shop gauge is correct?

Due to RV people inflating their tires to MAX sidewall psi all the time, Transport Canada requires tire shops to have accurate gauges so MAX psi is never exceeded. So it's a good place to check your own tire gauges.

Uh oh, I hope you never check your tire pressure after a long highway run in the summer! The result may give you a heart attack.

I hope (and assume) that people know that "max" pressure on most LT tires means cold temperature, before tires warm up from travel. Easiest thing is to just check tire pressure in the morning.
wintersun
Explorer II
Jul 11, 2014
I have two and both were bought at truck stops. Cost was a little bit more but they are rugged and accurate. Before I found them it was a******shoot.
720Deere
Explorer
Jul 10, 2014
06Fargo wrote:
dave54 wrote:
06Fargo wrote:
I have 3 tire gauges that don't agree with each other - 5 psi difference. I've been meaning to take them to my local tire shop and have them checked.

How do you know the local tire shop gauge is correct?

Due to RV people inflating their tires to MAX sidewall psi all the time, Transport Canada requires tire shops to have accurate gauges so MAX psi is never exceeded. So it's a good place to check your own tire gauges.

Uh oh, I hope you never check your tire pressure after a long highway run in the summer! The result may give you a heart attack.
Belgique
Explorer
Jul 10, 2014
My Milton, with gauge, is way off....I think. Let's say it differs greatly from my TST tire sensors. If I check with other traditional gauges they all vary in all directions. I've decided, in the absence of a better idea, to use the TST Sensor as ground truth.
DanKirk
Explorer
Jul 10, 2014
Here is the best one that I could find. I bought one from Amazon, and it works great. It is a Milton tire inflator, with gauge.
Sfla2
Explorer
Jul 10, 2014
Aug 2010 Motorhome mag has a good article. if u need more PM me .will send 4 pgs
jfkmk
Explorer
Jul 09, 2014
tvman44 wrote:
I have a HF Infrared Temp Gauge that tracks exactly with my Fluke Infrared Gauge that cost 6 times as much as the HF. :)
BurbMan wrote:
jfkmk wrote:
I wouldn't expect anything purchased at Harbor Freight to be accurate.

Actually, their torque wrenches are very good, tested by Car Craft magazine and measured to within .2 ft/lb as accurate as the Snap-On models costing $$$ more.

I've read the same thing about their torque wrenches but don't understand it. They have a store near where I work. I've been there and their stuff seems so cheaply made. I do know some people who have had their power tools and can't stand them. I guess their stuff is bit or miss.
noteven
Explorer III
Jul 09, 2014
dave54 wrote:
06Fargo wrote:
I have 3 tire gauges that don't agree with each other - 5 psi difference. I've been meaning to take them to my local tire shop and have them checked.

How do you know the local tire shop gauge is correct?

Due to RV people inflating their tires to MAX sidewall psi all the time, Transport Canada requires tire shops to have accurate gauges so MAX psi is never exceeded. So it's a good place to check your own tire gauges.
Ron3rd
Explorer III
Jul 09, 2014
720Deere wrote:
http://www.campingworld.com/shopping/item/si-robertson-signature-edition-treasure-commander-tc1x-digital-metal-detector/71725

CLICKY

Very similar to the Accu Gauge I posted above but without the flex hose. Both have the button release which I really like.