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Old 06-03-2016, 03:23 PM   #41
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Location: Akron, Ohio
Posts: 950
Originally Posted by lbrjet View Post
There is always going to be different weights on each tire. What rockfordroo was trying to point out is that the poster has A LOT of leeway to absorb the difference. Enough to absorb even a 500 lb difference and and still have a good leeway after that. Tireman needs to get a grip sometimes and recognize the obvious before writing what I deemed to be a derogatory post.

2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K
If I was derogatory I apologize.

Tire capability 1,820,
applying reasonable margin of 15% for side cornering and wind loading we see 1,547 as what I would consider a reasonable max static load.
A unrealistic, perfect 4 way split indicates tire loading of 1,200 in best case.

My point is that without getting actual scale weights, tires may be overloaded. RVSEF says the majority of RVs they have in their database have one or more tire in overload. We have not addressed Interply Shear which increases shear loading by about 24%. or a possible 5 to 10 psi error in the pressure gauge which I find in 10 to 20 % of gauges I check against digital gauges that are accurate to +/- 0.5 psi. So yes I am concerned that a tire might be overloaded.

A review of this and many other posts on tires on this and other forums finds a good number of people complaining about tire failures. All I am trying to do is offer possible reasons and suggested actions aimed at lowering the probability of having a tire failure. This, despite the fact that makes me frustrated, is that I have difficulty obtaining what I consider the minimum information needed to provide an informed opinion.

I write a blog on RV tire application and safety.
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV
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Old 06-03-2016, 03:28 PM   #42
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Join Date: Sep 2014
Posts: 75
On my previous TT, I installed the Maxxis 8008 E rated tires. The TT called for D rated but I opted to go to a higher rated tire and spend a few extra dollars in the name of safety. I absolutely loved the way those tires handled. My current TT is two years old and I guess I should check the make date on them but when it's time to change them, I'm going with the Maxxis.
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2015 Cherokee Limited 274DBH
2000 F250 CC SD V10 4X4 8' bed, 4:30 gears, SCT X3
2007 Mustang Convertible V6 - Lots of GT mods
1965 Mustang Coupe I6, 3 spd. manual
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Old 06-03-2016, 05:43 PM   #43
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Posts: 1,345
Tireman, if you read his thread more carefully you will see he upgraded to a 'D' range tire with a 2150 load capacity. That is why he has a good leeway.

2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K

2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
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Old 06-03-2016, 06:39 PM   #44
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Originally Posted by ependydad View Post
I'm running much higher weights, but I saw up to a 500 lb. split between tires.

I can't imagine a lighter unit would see a such a swing, but it can be pretty surprising how far of difference that there can be. Especially when you don't see it by weighing the axles. I only saw it when I did the individual wheel weights with Escapees.

Escapees SmartWeigh
I'm sure no expert, but it would seem to me, all things being equal, that if your TT was overloaded on one side, both tires on that side would be higher, but close together, while the other side would be lower but close together. If it was overloaded front to back, I would expect to see the either the back or front higher, but similar, with the other pair lower but similar.

Seems if you just loaded down one corner, the tire closest would be high, the one farthest would be low, and the other two would be "similar" in between.

But having 3 at (essentially) 3500 lbs, but the other at 2950 lbs seems weird. Like something's wrong with your suspension. Right front tire doesn't seem to be pulling it's weight (pun intended!).
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Old 06-03-2016, 09:07 PM   #45
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Posts: 1,345
I also thought that was very strange.

2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K


2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
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