Monday, Jun 20, 2022 at 17:38
Just to be clear, the Safety Dave units are those little transmitters that screw on in place of the valve caps, so pretty small.
I have three gauges I used to
check tyre pressures. One is a digital gauge that came as part of my Bushranger Max Air III Compressor. I also have an ARB deflator with an analogue gauge, and a large analogue gauge I bought from somewhere like SCA or Repco a few years ago. Surprisingly when I set my tyres at 40psi and measured using all of them out of interest, all three agreed, but the TPMS had a different view on some wheels. Not by a lot, but perhaps 1-2psi. The TPMS lost the vote 3-1.
I did this
test because not long after I got the TPMS, I set the tyres using one of the gauges and soon after the TPMS seemed to suggest that some tyres had drifted slightly, which they hadn't. But when winter comes and/or I haven't checked pressures for a while, and the TPMS tells me the tyres are down to 35, I know that it's time to top them up.
How do I set pressures? Partly by following the advice of people whose
views I respect, and partly by the 4PSI rule. For that I use the TPMS. In doing so I am assuming that is a more reliable for changes in pressure than absolute levels.
FollowupID:
920014