Quote:
Originally Posted by tuccillo
There may be something else going on. Regular, old air is 78% nitrogen. I have added air to tires originally filled with (presumably) 100% nitrogen and not had any issues.
|
The reason the N2 fill is better is because the pressure for 100% N2 has less sensitivity to temperature than an air fill. That being said, the only issue from adding air to an N2 fill is that the mix will be less than 100% N2 but not that much less unless you deflate the whole tire and refill it with air as the air is 78% N2 as stated above. So the air/N2 mix is not as good as the N2 only but way better than the 100% air tire, as related to temperature sensitivity.
With respect to the sensor not resetting after a fill: They are built with a fixed hysteresis on the alarm switch mechanism. If the light is off with 33 psi but then comes on at 32 psi and stays on at 31 psi and then you fill it to 33 psi the light should still be on. You have to fill it to a value above the built in hysteresis limit like 35 or 36 psi. Then when it resets you can bleed a few psi down to the optimal pressure (for my example 33 psi).