Question about Pressure Pro and Hot Hubs? - RV-Dreams Community Forum

Grant · RV-Dreams Family Member

Question about Pressure Pro and Hot Hubs?

Racerguy · RV-Dreams Family Member

I don't believe a 300 degree hub is drastic enough to raise tire pressure that much.

dream reachers · RV-Dreams Family Member

I had a brake caliper on my truck go bad last summer while traveling in Wy. The Pressure Pro went off on Hi Pressure Alert. I pulled over and checked the wheel the alert indicated and it was too hot to touch, the other wheels were fine. It did require brake repair but might have been worse if I had not been alerted.

dream reachers · RV-Dreams Family Member

PS to last post: I forgot to mention that the Hi Pressure Alert is adjustable. We have increased ours from the factory setting because it was going off after normal travel on a hot day. It can be set up on different % increases of pressure change. I bought mine from Mike and Pat McFall, www.pressureprosystems.com He can explain it to you if need more clarification.

Linda · Hostess

Grant,

Our tire pressure did not go up enough to sound the alarm. It is set to alarm you if it goes up or down by 12% or more. The pressure was up a little from the other other tires but nothing significant.

Grant · RV-Dreams Family Member

I am amazed that with the outside temperature of 100 degrees and a hub temperature of over 300 degrees that the tire pressure didn't go up dramatically. I guess that leaves the question of what would it take to make the Pressure Pro's high pressure alert of any value?

injunear · RV-Dreams Family Member

Grant
I don't beleive there is enough mass in the trailer wheel to allow 300 deg. to migrate out to the tire. In which case it would increase the tempature by a degree or two. The cooling of the wheel as you travel down the road would cause the heat to disapate before reaching the tire.

Wayne

Racerguy · RV-Dreams Family Member

Grant,
The value is that if something would happen that would raise the pressure above the limit set it would then let you know. Remember it is only monitoring tire pressure and not anything else. The monitor only cares what the tire pressure is, not how hot the hub is. Wayne is correct about the heat disappating before it reaches the tire and affecting it in any way. I feel a pressure Pro is a must have for traveling.

Grant · RV-Dreams Family Member

Racerguy wrote:

if something would happen that would raise the pressure above the limit set it would then let you know.

My question is: If a 300 degree hub in 100 degree heat isn't enough to raise the pressure above the limit, what circumstance would it take to reach the limit?

traveljunkie · RV-Dreams Family Member

O.K. I have to add something here because I was cracking myself up. When I first read the title of this post I thought it said: "Question about Pressure Pro and Hot Tubs"? I was thinking, what use can there be for pressure pro monitors in hot tubs? If someone has pressure in a hot tub won't that just cause some bubbles....I don't want this post to get off topic but had to comment on my misread...thought you might get a chuckle:)

By the way, we have the pressure pro's on our truck and 5th wheel and they work great.

heyjohnm · RV-Dreams Family Member

Did a search on tire pressure monitors & found a system that reads both pressure and temperature.

http://www.tsttruck.com/Product_List.html

Anyone have experience with a system that reads both??

Howard · Host

I mistakenly told Linda that the sensor goes off when the tire increases in pressure more than 12% of the target pressure (which we set). The factory set "high" pressure alert actually goes off at 24% over the target pressure. As stated in another post, that can be adjusted.

The "low" pressure alert is at 12.5% below the target pressue and then there is a louder, more serious alert at 25% below the set target pressure.

On a good tire, the pressure actually increases naturally when driving. Our experience has been that it increases 10 - 20 percent. Even in our recent situation, the tire pressure on the problem wheel did not increase above the 24%.

As others have stated, heat of the hub doesn't necessarily transfer to the inside temp and therefore pressure of the tire. I'm not sure what combination of circumstances would make a tire pressure increase to the 30% or more range, but if that happened, Pressure Pro would alert and I'd definitely be concerned. smile

Now, it's my understanding that the newer PressurePro systems have the ability to measure both the pressure and the temperature through the sensor. I haven't seen that in action yet, but I'll be looking into a possible upgrade.

P.S. I also first read this topic as Pressure Pro & Hot Tubs. biggrin