Tire Pressure Gage
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Novice
Joined: May 2007
Posts: 18
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From: Florida
Tire Pressure Gage
I've got three different dial pressure gages, including one of HD's and they all give me a different opinion about what my tire pressure is, with an 8 PSI spread.
I've searched on line for gage accuracy issues, even stopped at a local speed shop. Most folks give me a blank look and tell me they accept whatever their gage says as gospel.
Anybody know how to find reasonable accuracy without sending the gages out to a calibration lab?
I've searched on line for gage accuracy issues, even stopped at a local speed shop. Most folks give me a blank look and tell me they accept whatever their gage says as gospel.
Anybody know how to find reasonable accuracy without sending the gages out to a calibration lab?
Cruiser
Joined: Mar 2009
Posts: 199
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From: Lincoln, NE
I have the HD with extended hose and tread depth gauge. I find it to be accurate enough, within 1-2 psi. With that said, how accurate do you need it to be? Are you looking to determine the best pressure for launches?
A possible problem is that each time you're hooking up the tire gauge you are letting out enough air to cause the difference. I'll assume that the three tire gauges were tried back to back to back to negate the possibility of temperature changes.
-Barry-
A possible problem is that each time you're hooking up the tire gauge you are letting out enough air to cause the difference. I'll assume that the three tire gauges were tried back to back to back to negate the possibility of temperature changes.
-Barry-
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Novice
Joined: May 2007
Posts: 18
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From: Florida
I have the same HD unit (also made in China) and without having a known standard to compare it to, or the other ones, I don't know which one's right. How do you know you're within 1-2 psi?
I'm not letting out enough air to make a difference. Same spread between the three gauges when used on the car, truck and bike. I've got a Vette with the computerized air pressure readout on the dash and I compare the guages to it. One of the gauges is fairly close to the Vette read out but I'm not sure what can be trusted. Maybe there's bigger things to worry about but it just bugs me and I'll figure it out somehow.
I'm not letting out enough air to make a difference. Same spread between the three gauges when used on the car, truck and bike. I've got a Vette with the computerized air pressure readout on the dash and I compare the guages to it. One of the gauges is fairly close to the Vette read out but I'm not sure what can be trusted. Maybe there's bigger things to worry about but it just bugs me and I'll figure it out somehow.
Advanced
Joined: Sep 2008
Posts: 55
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From: Land of Confusion
You didn't mention if any of the tire gauges were digital. Digital tire gauges are the most accurate, but even they can be miscalibrated on occasion. Unless you have the tendency to be overloading your bike (i.e., your gross vehicle weight is at or above the maximum inflation load limits of the tires) then I wouldn't quibble about 1 or 2 PSI cold...but if you are at or over that limit, even that small amount can make or break you.
Cheers
Cheers
Elite HDF Member
Joined: Jun 2009
Posts: 3,785
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From: Eastern Washington State
I'm having the same problem. I also have a Harley unit with tread depth gauge and I have a problem getting the fitting to get a tight seal on the valve stem. Always lets out some air and it's just a PITA to try to use. I have another gauge with a Blue Point label that I got from a Snap On salesman. I've had it for several years and it's easy to use but I have no way to know if it is entirely accurate or not.
I have a similar problem with thermometers and my reef tank. Several different units and all giving different temps. Bunch of cheap azz made in China junk.
I have a similar problem with thermometers and my reef tank. Several different units and all giving different temps. Bunch of cheap azz made in China junk.
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Novice
Joined: May 2007
Posts: 18
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From: Florida
All three of mine are dial mechanical gauges. A pound or two is nothing but if it's off 8 psi, like the range I've got, that's not good.
My employer used to have a calibration lab but they did away with it. I plan to see if there's a local lab that could check my gauges. Foodog, you could do the same thing probably.
My employer used to have a calibration lab but they did away with it. I plan to see if there's a local lab that could check my gauges. Foodog, you could do the same thing probably.
Road Captain
Joined: Jan 2009
Posts: 643
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From: Vancouver
Craftsman digital is a good one and Milton make a pretty good gauge. I have been in the industry for 30 years and have found that no two gauges will read exactly the same. Find one you trust and throw all the other ones away. I use one gauge I trust and gaurd it with my life. Good luck
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