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Old 05-29-2016, 08:37 PM   #15
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Yes, agree that the monitor alarming, is, well, alarming....took me awhile to figure out how high the pressure would go on a 100+ day on asphalt with my 120psi tires--I now have the upper limit at 150, as it gets close to this on very hot days/long runs.
I don't worry about %, just what range the tires will run and go higher/lower as needed.
Then there are the cold monnings at 9000ft--that is on the other end of the scale.
Joe
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Old 05-30-2016, 07:36 PM   #16
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There are as many schools of thought on the correct tire pressure as there are models of RV's. Some just pump up the tire to the max psi stated on the tire. Others weight each individual tire and adjust pressure to the load.

I discussed tire pressure with an engineer at Continental Tire about my F450 truck tires. He stated the tire pressure chart for each brand/model tire is created to maximize the tires performance at different loads. Overinflating and underinflating both reduce the performance of the tire whether it is traction, heat, or just wear-and-tear. I used the chart for each brand and model of tires on my truck and 5th-wheel. My pressure and temperatures run fine.

He also stated that, for a trailer, overinflated tires reduce the tires ability to absorb smaller bumps and also rebound. Rebound is what most of us call bounce. He was not talking about the kind of bounce that shuffles the dishes in the cabinets but a gentle bounce. He stated that the higher vibration from overinflated tires can cause vibration damage to the trailer. A gentle bounce is easier on the trailer that a sharp jar.

I added a TPMS to my truck and trailer tires after I ruined an inside dual on my truck. Personally, I don't fret about the tire temperature. I just monitor the tire psi. As long as the tires are inflated to the correct psi for the load, the tire temperature should remain below the tire's maximum heat range. Of course, a locked brake or some other catastrophic event could cause the tire to overheat. I still have the TPMS to catch that.
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Old 05-30-2016, 08:56 PM   #17
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You have the 17s on your 450, right?
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Old 05-31-2016, 02:41 AM   #18
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You have the 17s on your 450, right?
I have the 19.5" aluminum wheels with Continental Commercial HDR tires.

I looked at the brochure for the 2010 F450 and they came with the same 19.5 polished aluminum wheels as mine.
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Old 05-31-2016, 06:28 AM   #19
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The '12s didn't come with the 19.5s--did you have them put on? Those tires are really nice for eliminating most threats of flats.
Joe
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Old 05-31-2016, 10:45 AM   #20
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The '12s didn't come with the 19.5s--did you have them put on? Those tires are really nice for eliminating most threats of flats.
Joe
Wow! I didn't realized they went with the smaller hubs with the 8 lugs on all the standard trucks after 2010. The 19.5 wheels have 10 lug holes.

I wanted a RV hauler body so I ordered a chassis-cab and sent it to Oregon to have the body installed. I also wanted the larger brake disc, 15.35" rotor diameter. To me, what my truck can pull is not as important as what it can stop, in most circumstances. I know the trailer has brakes, but things happen or I could have a senior moment or forget to plug in the trailer connector.

As far as flats go, on our first long trip, somewhere between Fort Worth and Lubbock, an inside dual picked up a big screw. By the time I noticed it was flat, the tire was ruined. After paying approximately $350 to replace the tire, I installed a TPMS to monitor all tires on the truck and trailer.

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Old 05-31-2016, 04:56 PM   #21
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The '12s didn't come with the 19.5s--did you have them put on? Those tires are really nice for eliminating most threats of flats.
Joe

The 11's came with 17's also.
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Old 05-31-2016, 08:00 PM   #22
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As did the '13s and 14s...
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Old 05-31-2016, 08:03 PM   #23
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Carl,
I'm sure there are lots of similar-looking RV parks, but that pic looks like Mountain Views in Creede?
I've had one flat in over 240k miles of running in 2 450s, but can't say the same about the engines...
Joe
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Old 06-01-2016, 09:53 AM   #24
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Carl,
I'm sure there are lots of similar-looking RV parks, but that pic looks like Mountain Views in Creede?
Joe, your da man! That is Mountain Views in Creede. We visited in 2014 and loved the spot we were in so much, we bought it. We originally thought, why buy a spot in a resort, might as well by a house. Well the cost is a lot less than a house and when we retire in 2019 we will use it as a staging area to travel up and down the Rockies.

My wife is a flat magnet. She gets more flats with just four wheels on the ground than I do with ten. Of course she's a road warrior that drives 50 miles round trip to work each workday. Beats me how she finds all that hardware. At least she keeps a lot of FOD off the road. For non-aviation types, FOD is Foreign Object Damage. Debris that can cause damage and injury to aircraft or personnel, respectively.

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Old 06-01-2016, 10:51 PM   #25
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That is a very nice RV park, and basically the only game in town. We have stayed there twice, but on the other side of the tracks....we usually camp at Bristol Head FS CG up the Lake City highway.
Fixing to head out to Alaska June 5...
Joe
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Old 06-02-2016, 07:52 AM   #26
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Tire Pressures

We have "E" rated tires on our 2002 HR Presidential. Factory and Tire Manufacturer recommend 80 psi cold for proper load carrying. We started using TPMS on the trailer last trip. 250 miles outside temps ranged from 60-85 deg. Tire pressures went up between 88-90 psi. Never worried about tire temps even though it does also monitor them. Tire temps might be helpful if brakes were dragging or bearing was heating up.
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Old 06-03-2016, 10:05 AM   #27
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Karpcbk14 and other, I agree TPMS are great for making sure all tires are staying consistence with pressures and temps (depending on where the sun is) but, I still find them the most usefully if you were to have a blowout or fast leak to give yourself a chance to minimize or prevent any damage to your equipment or others at 55 or 60 mph a lot of distance goes by pretty quick.
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Old 06-03-2016, 10:47 AM   #28
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With a Cummins siting on my front tires, I would not leave home with 45lbs in my tires. It's asking for trouble. When towing, no mather what, front tire condition is very important. My truck ask for 70 lbs and you bet it has that and plus. To many vehicles on the side of the road rolled over, that tells me drivers do not drive with proper inflated tires.
It's well known that under inflated tires will overheat and fail. It's not if but when. So do not reduce air pressure for the sake of drive quality. Get a caddy and do not haul a trailer if ride quality is a stake.
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