Accurate tire pressure ?

drwelby wrote:The Meiser 60psi presta gauge is exactly what you want. Probably the best $14 I've ever spent on my bike.

WFRTony wrote:I have had good luck with the digital SKS gauge.

http://www.nashbar.com/bikes/Product_10053_10052_561001_-1___[/QUOTE]
Thanks. I have a similar digital gauge from Topeak. My complaint with the Topeak is that it uses a so called "smart head" that fits both presta and schrader. The problem is that when you use this head on presta valves, it releases a lot of pressure before engaging. I do however, like the fact that the head rotates and makes reading very easy (important for my sore back). Does the head of the SKS also rotate for easy reading by old dudes with bad backs? BTW, I have similar issues with the mechanical gauges suggested earlier. Another solution I'm trying is a digital gauge for my compressor made sold by Prestaflator. It's supposed to be accurate to .5 psi. Of course, that means using my compressor instead of a floor pump.

bobknh wrote:
Thanks. I have a similar digital gauge from Topeak. My complaint with the Topeak is that it uses a so called "smart head" that fits both presta and schrader. The problem is that when you use this head on presta valves, it releases a lot of pressure before engaging. I do however, like the fact that the head rotates and makes reading very easy (important for my sore back). Does the head of the SKS also rotate for easy reading by old dudes with bad backs? BTW, I have similar issues with the mechanical gauges suggested earlier. Another solution I'm trying is a digital gauge for my compressor made sold by Prestaflator. It's supposed to be accurate to .5 psi. Of course, that means using my compressor instead of a floor pump.

WFRTony wrote:

Two sided head is presta on one side and schrader on the other. The head rotates, but it also holds it's reading when you remove it from the valve so it is easy to read. Reads to .1 psi and bar. I have noticed that the gauge on my Lezyne floor pump reads about 5 psi higher than the SKS, but the pump is measuring the pressure in the hose while it is connected, and the SKS is reading the pressure in the tire. Like shiggy said, "It does not really matter if the gauge is accurate. It just needs to be consistent and reliable, then you use only that gauge to check your pressures."

bobknh wrote:
Thanks for the additional info. I'm new to low pressure fat tubeless tires. All the tire pressure advice that I'm seeing here, and on Gravel Cyclist seem to suggest a pressure range for 40mm tubeless around 30-35 psi. Wouldn't an error of 5-10 psi make a big difference? Then again, probably once I ride these tires (40 mm Rambler Tubeless on HED Tomcat rims) , I'll be less concerned.

jonz wrote:

When you find an inflation pressure you like, it doesn't matter what that number is on a gauge as long as you repeatedly get to that pressure.  If the gauge reads 5 - 10 psi different each time you measure the same tire, that is a big deal and not acceptable.  

+whatever for the SKS gauge.
https://www.sks-germany.com/en/products/airchecker/

I've had lots of gauges over time (i.e. I'm old) and this may be my favorite.

It does have the capability of measuring the pressure from both schrader and presta valves but the head has two openings, one for schrader and one for presta, not one opening that measures both.