No, I haven't gone off my rocker as there is some logic behind the title and advice of today's post.
For years the advice has been to check the air in your tires every month and on the RV every morning of every travel day. The primary reason for this decade-old advice has been based on the fact that most RVs have at least one tire in overload or under-inflation or both. Also it is a fact that all tires lose pressure over time and since it is the air pressure that carries the load, not the tire, this makes having sufficient air pressure more important on RV application than with your regular car.
Why is it more important with your RV? One major reason is that your car probably has a significant margin in the +12% to +25% range while RVs have more like -5% to +5%, with the plus signifying excess air pressure above the minimum needed to support the load.
But this doesn't explain why I am suggesting you stop checking your air pressure with your hand gauge each morning. The reason for making this surprising suggestion is the fact that the very act of checking your air pressure can, in a small percentage of the times, result in a slow leak through the tire valve core. In some earlier posts on "valves" I showed the sealing surfaces of the valve core and why they can leak. In my experience, valves generally do not develop leaks and are pretty reliable, but the act of checking your air pressure does open the core and there is a possibility that a small piece of grit can be introduced into the core air seal and this grit can cause a slow leak.
Ever wonder why so many people who have a tire sidewall flex failure or "blowout" make the statement, "I just checked the air a couple hours prior to the failure"? Well, this is one of the possible reasons for the small, slow leak.
Now, having made the suggestion that the act of checking your air pressure might possibly cause a tire failure so you might consider not checking your air pressure is only a reasonable suggestion IF you have another method of knowing that your tires are properly inflated. We have that method and it is a Tire Pressure Monitor System.
To me that is the ONLY alternative to checking your air pressure every morning, also every rest stop, also every fuel stop -- and even all those checks will miss a majority of the exposure time when a leak can occur. PLUS, the more times you check your air pressure the greater the opportunity there is for the very act of checking if you have a leak could result in a leak.
If you have a TPMS you really only need to check its accuracy maybe once a season unless you are getting erratic readings and signals. Using a TPMS will not only make life easier in that you don't have to check the tire pressure multiple times a day, but it will also decrease the likelihood of your actions causing an air leak.
If you don't have a TPMS, then you probably should be checking your air pressure frequently -- but just remember that each time you open the valve with your pressure gauge it may not completely seal shut, with a resultant slow leak.
If this post gets you to finally make the decision to get a TPMS you might read my post on Best TPMS to help you make a good purchasing decision.
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