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Accurately getting 15 psi into tires

H

Hoginedgewood

Member
Guages are most accurate when used in the middle of their range. So a 120# tire guage is not what I prefer for the front tires. Wondering what works good for you.
 
This is what I use to check the pressure. Easy to adjust by either pumping in air or letting air out, and their is no air loss when disconnecting. I also used it for adjusting the air in the rear air bag. Of course if more than a pound or two is needed I use my air compressor, and then final adjustment with the hand pump.

https://www.shoputahharley.com/prod...oF2VaVFFUPlTJeYhRUA4RLME_D8Np-akaAonHEALw_wcB

There are other brands available, but I had this from my Harley days.
 
While gauges may be most accurate in the middle of their ranges, a variety of gauges with similar or identical ranges from different manufacturers could have substantial variations, as could multiple gauges of the same model/style from the same manufacturer, although one would expect those from the same manufacturer to have smaller, variations but don't bet on it. The consumer has neither any idea of the calibration accuracy of individual gauges at the time of purchase nor the degradation of calibration over time and use. We're not dealing here with scientific laboratory accuracy either so, IMO, the safest bet is to do some research on gauges, select the one that meets the standard(s) one expects and dole out the $$. Again IMO, one wants a gauge that is easy to use and, most important, results in the least air escaping when pressing onto and removing the chuck from the valve stem. After that, one then has to only contend with the amount of air in the tires to get the ride the rider finds best for their preferred quality of ride. FWIW, I purchased the gauge in the picture from the dealership when I bought my Spyder. As a matter of practice, when I check tire pressure weekly or before a ride if the bike has not been used within a week of last pressure check, if the gauge reads below the pressure I routinely set I add more air than necessary and bleed it down with the gauge to the setting I prefer. I use a floor bicycle pump that is more than adequate for Spyder tires.
 

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I bought several fairly expensive gauges some years ago, intending to keep one with each vehicle. I also have a good one on the end of the air hose for my compressor. They are all the rotary dial analog type.

Recently, I had reason to compare the reading for trailer tires on two different gauges and found they were 6psi different. I then brought together all my gauges and found variations between several of them. Then I checked them against the TPMS on my truck. Eventually I was able to narrow it down to the two or three that were most inaccurate and sidelined them. I wish I had done this when I first bought them; I don't know if the 'bad' ones started out that way or became that way over time.

Rather unsettling to discover after all this time that I never really knew what pressure I had been running in my Spyder tires particularly.

Consumer Reports says digital gauges seem to be the most reliable type so I may get some of those.
 
2dogs said:
Hey, that's the same gauge I use. The FFFFT= about 1/2 to 1/4 psi, depending on how fast you are. I've discovered hearing aids help with the process. LOL
Click to expand...
I never tried using hearing aids to check air pressure. How does that work? :shemademe_smilie:
 
PW2013STL said:
This is what I use to check the pressure. Easy to adjust by either pumping in air or letting air out, and their is no air loss when disconnecting. I also used it for adjusting the air in the rear air bag. Of course if more than a pound or two is needed I use my air compressor, and then final adjustment with the hand pump.

https://www.shoputahharley.com/prod...oF2VaVFFUPlTJeYhRUA4RLME_D8Np-akaAonHEALw_wcB

There are other brands available, but I had this from my Harley days.
Click to expand...

Interesting. How do you adapt it to attach to a standard tire valve?
 
:agree:Same here PW! I use it on my Specialized E-bike as well. It does take a lot of pumps to increase a front tire by 2psi though.:gaah:
 
PW2013STL said:
This is what I use to check the pressure. Easy to adjust by either pumping in air or letting air out, and their is no air loss when disconnecting. I also used it for adjusting the air in the rear air bag. Of course if more than a pound or two is needed I use my air compressor, and then final adjustment with the hand pump.

https://www.shoputahharley.com/prod...oF2VaVFFUPlTJeYhRUA4RLME_D8Np-akaAonHEALw_wcB

There are other brands available, but I had this from my Harley days.
Click to expand...
I wondered if that would work on a tire. HD is proud of their stuff ($), but it's usually quality.
 
JayBros said:
While gauges may be most accurate in the middle of their ranges, a variety of gauges with similar or identical ranges from different manufacturers could have substantial variations, as could multiple gauges of the same model/style from the same manufacturer, although one would expect those from the same manufacturer to have smaller, variations but don't bet on it. The consumer has neither any idea of the calibration accuracy of individual gauges at the time of purchase nor the degradation of calibration over time and use. We're not dealing here with scientific laboratory accuracy either so, IMO, the safest bet is to do some research on gauges, select the one that meets the standard(s) one expects and dole out the $$. Again IMO, one wants a gauge that is easy to use and, most important, results in the least air escaping when pressing onto and removing the chuck from the valve stem. After that, one then has to only contend with the amount of air in the tires to get the ride the rider finds best for their preferred quality of ride. FWIW, I purchased the gauge in the picture from the dealership when I bought my Spyder. As a matter of practice, when I check tire pressure weekly or before a ride if the bike has not been used within a week of last pressure check, if the gauge reads below the pressure I routinely set I add more air than necessary and bleed it down with the gauge to the setting I prefer. I use a floor bicycle pump that is more than adequate for Spyder tires.
Click to expand...
Bicycle pump with a guage was on my mind!
 
Hoginedgewood said:
I wondered if that would work on a tire. HD is proud of their stuff ($), but it's usually quality.
Click to expand...

I use a pump similar to that on my shocks on my sleds, I find that when you have to unscrew the hose, lot's of times you will loose a little air! I can't picture how many times you would have to pump the thing to do a car tire size unit!! Think you would get very tired!!
 
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