Coyote Chris
Site Supporter
So, three percent of 30 is a lb. Plus one pound. So plus or minus 2 lbs?Your post reminds me of the old proverb, "A man with a watch always knows what time it is, while a man with two watches is never sure." The gold standard for TP gauges is Milton or Schrader. Buy one and use it as your standard. I use and have had very good service from a digital made by Slime. I would say that any quality gauge you buy is accurate to +- 3% plus one pound. The digital's accuracy will be on the packaging.
Mike
Milton has three styles. A pencil, a dial and a digital.Your post reminds me of the old proverb, "A man with a watch always knows what time it is, while a man with two watches is never sure." The gold standard for TP gauges is Milton or Schrader. Buy one and use it as your standard. I use and have had very good service from a digital made by Slime. I would say that any quality gauge you buy is accurate to +- 3% plus one pound. The digital's accuracy will be on the packaging.
Mike
What is the center one? FWIW,
Mandatory, by a shop authorized by the state's calibration office... they even have a seal on the case...Your gas stations have calibrated gages?
Yup!So, three percent of 30 is a lb. Plus one pound. So plus or minus 2 lbs?
I think the Car and Driver folk are probably right. The gage that said 36 pounds went into the trash. Since the digital gage said 28, and two others said 28 and the whole pile of round ones said 30, I think they are all close enough. The main thing is to check them once a year....tire pressure is a moving target....relative vs absolute....and air temps and how hot the tire gets all change things....A gauge accuracy may be tied to a % of full scale so your 100 psig gauges may be good to maybe 3psig.
Then how accurate does it need to be? To me 3-4 psi is good enough. Given the variables of road temps in the South compared to up North and things such as that it can swing real tire temps while riding quite a bit. I think consistency is as important.
I said 3-4 psi is good enough but when I set the bike's tires I set them within .5 to 1 psi as read on my gauge.
A large problem with gauges is the abuse they take getting dropped or tossed in a drawer.
I also mostly use a Slime digital. It seems consistent and trustworthy. If I was still working I might check the cal now and then but that is not convenient for me any more.
On those dial type gauges if you have a good gauge to calibrate it with you can likely reset the needle and be in working accurate order again. It looks like you may have enough gauges, just need them to work right.
Arknt