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Unread 08-17-2009, 09:19 PM   #1
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Default Pen tire gauge question

I have a pen tire gauge that is very similar to this.



My question is, how do you read it?

My tires can hold a maximum of 51 PSI. When I use the pen to check my air pressure, the sticks goes down and I read 3.6 on the pen. I don't understand what I am reading. Can someone explain it to me please.

Also, am I suppose to hear air coming out when I insert the pen?

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Unread 08-17-2009, 10:12 PM   #2
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Just put the head onto the tire stem...the gauge should shoot partway out the other side. Most tires should be right around 30psi. If it's only reading 3.6 then either you're reading it wrong or it's not on straight.
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Unread 08-17-2009, 11:26 PM   #3
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Yeah a little stick will shoot out the bottom, look for the psi side and read the number closest to the base of the pen, this is your tire pressure.
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Unread 08-18-2009, 10:29 PM   #4
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Okay, I checked it again today, it says 36 PSI, NOT 3.6 PSI. How do I know how much PSI I need to pump my tires up to?

What happens when it is too high? Say like 40. What happens when it is low? 30. Is driving more rough at 40 PSI compared to 30 PSI since the tires would be harder?

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Unread 08-18-2009, 10:33 PM   #5
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it will list the required pressure on the tire placard in the drivers door usually although some vehicle's don't have one. What kinda of car is it and what size tire.
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Unread 08-18-2009, 10:40 PM   #6
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if you respond now i can look up the pressure real quick while im online
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Unread 08-18-2009, 10:42 PM   #7
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Quote:
Originally Posted by lautinjr View Post
if you respond now i can look up the pressure real quick while im online
It is a Nissan Pathfinder 2001 SE. I don't know how big the tire is though. I would check right now, but it's dark and wet outside.

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Unread 08-18-2009, 10:45 PM   #8
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It's supposed to be rated for 26 PSI. So let some air out. I don't think 10 PSI would hurt anything.
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Unread 08-18-2009, 10:48 PM   #9
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Quote:
Originally Posted by wierdo124 View Post
It's supposed to be rated for 26 PSI. So let some air out. I don't think 10 PSI would hurt anything.
Would I get better mileage with higher PSI since there's less drag?

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Unread 08-18-2009, 10:48 PM   #10
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dam beat me to the punch and i was looking forward to using my new MAST guide. 26psi is dead on 10 psi over would cause less contact patch and center wear but not damage the tire itself.

Wierdo what did you look that up on?
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