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Old 07-01-2020, 03:34 PM   #21
steiny93
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Originally Posted by Last2Die View Post
110 psi is exactly where these tires should be, so I have also been told on this forum anything less would create additional unwanted heat..again learned that from this forum. I run mine at 110 period, not an issue since alignment new bearings correction and I’m on the road now as we speak.
Without weighing the axles the above statement regarding psi isn't supportable; psi is a function of weight. Granted my intel is also provided via an internet forum so I guess you'll need to choose which one to believe
 
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Old 07-01-2020, 04:09 PM   #22
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Originally Posted by RK & Jen View Post
I have a 2018 3790RD that has the left front tire wearing on the inside and outside which I believe is an alignment issue. I have contacted many of the large trailer maintenance companies in the St. Louis area but get the sorry can't help you. Any recommendation on who I could contact in the Elkhart, IN area that specializes in alignments. Thanks.

Ron
Perhaps this image could help
https://fixautousa.com/wp-content/up...tyre-wear1.jpg

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Old 07-01-2020, 04:39 PM   #23
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We have the exact same tire wear issue. The OEM Sailuns were garbage. They were wearing off like an eraser removing pencil on paper. Barely got 5,000 miles out of them.
I don't know what you did to your Sailuns but here is what all four of mine look like at 19,000miles. And yes I did run them at 95 psi in the beginning so that is why the outside is worn so much. Still plan on getting at least 20,000 out of them or they might date out during the pandemic.
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Old 07-01-2020, 05:46 PM   #24
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OP that's what tire scrub looks like. Make sure your at 110psi and no worries.
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Old 07-01-2020, 08:47 PM   #25
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I don't know what you did to your Sailuns but here is what all four of mine look like at 19,000miles. And yes I did run them at 95 psi in the beginning so that is why the outside is worn so much. Still plan on getting at least 20,000 out of them or they might date out during the pandemic.
My Goodyear's looked like that as well and had a few more miles than yours. Yours look good still. Note that those tires are regroovable meaning there is plenty of meat left. Mine timed out and it wasn't easy to change tires that otherwise looked fine.
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Old 07-02-2020, 05:25 AM   #26
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Pressure

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Originally Posted by Tom N OH View Post
Everyone has an opinion, some are right, some are wrong. Sailun provides a load/inflation chart for a reason. Tire pressures on these heavy duty tires should be adjusted according to average load to provide optimum tire wear. The old junk load range E & lower tires should be run at maximum pressure because they were run right at their limits as it was. These load range G tires have plenty of excess capacity.
I wasn’t aware of an inflation chart from sailun. Wouldn’t you use the placard on the side of the 5er that states the cold inflation temperature?
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Old 07-02-2020, 05:55 AM   #27
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Without weighing the axles the above statement regarding psi isn't supportable; psi is a function of weight. Granted my intel is also provided via an internet forum so I guess you'll need to choose which one to believe
My belief and “intel” is backed up with actual mileage and usage, so yes it is supportable. But hay do whatever you want keep buying tires no skin off my.....
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Old 07-02-2020, 05:59 AM   #28
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OP that's what tire scrub looks like. Make sure your at 110psi and no worries.
Are you sure...just saying don’t want your statement to be labeled as unsupportable lmfao....

It’s funny I had the same problem got the trailer aligned and new tires but my position and post is unsupportable....hmm...
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Old 07-02-2020, 06:20 AM   #29
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Our 2017 3791RD was 7/8” out of alignment on the rear axle. It was welded in that way. I took it to a semi trailer repair shop and they had a laser alignment machine. After checking it I was told the axle had to come out and be bent in their press ,to put the correct angle on the tire. It cost me around $380 and it took them 4 hours start to finish. They did a lot of work for that amount. I was happy. No wear at all now on that axle now.
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Old 07-02-2020, 06:23 AM   #30
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Our 2017 3791RD was 7/8” out of alignment on the rear axle. It was welded in that way. I took it to a semi trailer repair shop and they had a laser alignment machine. After checking it I was told the axle had to come out and be bent in their press ,to put the correct angle on the tire. It cost me around $380 and it took them 4 hours start to finish. They did a lot of work for that amount. I was happy. No wear at all now on that axle now.
380 that’s cheap !! Was it one or both axles ?

Tony
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Old 07-02-2020, 07:34 AM   #31
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One axle. But they stripped it down to work on it. Brakes off. Bearings out. Springs off. I thought it would cost more as he was explaining it to me. Anyone passing Youngstown Ohio area on I-80. Look up Commercial Truck and Trailer. They are located less than a mile off the interstate. Very friendly Family owned business.
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Old 07-02-2020, 07:42 AM   #32
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Mine was aligned also. They left everything in tact and bent the axle in place. I don't know if one method is better than the other but the tires wear properly $230 later.
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Old 07-02-2020, 07:53 AM   #33
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Both axles were removed and replaced in proper position. Had to replace tires after about 9k miles on the tires.
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Old 07-02-2020, 09:41 AM   #34
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Just a FWIW, my 2006 2955RL axles were misaligned from the factory. Not saying that’s your problem, but it’s something to check.
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Old 07-24-2020, 12:13 PM   #35
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We have the exact same tire wear issue. The OEM Sailuns were garbage. They were wearing off like an eraser removing pencil on paper. Barely got 5,000 miles out of them. I replaced them with Carlisles and have concluded that with higher rated tires like these Carlisles and running at 105 lb I get the best wear but still have excessive wear after 12,000 miles on the front tire on the driver side which is where all our weight is. This side has the kitchen with the longest slide out as well as the bedroom slide out. I’ve spoken with countless people about this including this forum and have concluded that this is a design/engineering issue. I could get slightly longer wear by rotating the tires regularly but have resigned myself to this being the nature of the Montana beast. Change tires every 12,000 to 15,000 miles. Alignment seems like a red-herring and the dealer says the axles are within “manufacturers spec”. Good luck with yours.
You could not pay be to roll down the road on a Carlisle tire. Had 6 of them on a new triple axle toy hauler and all 6 were cracked in the tread 3" long 1/4" deep in multiple places after just 5k miles. Hell I would not even put them on a lawn mower.
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Old 07-25-2020, 11:10 AM   #36
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Seminars at the fall rally by the vendor that provides the tires for most keystone products has said time after time that the PSI of the tires should be set to the psi indicated on the specific tire. The G614 says 110 and our are set at 110.
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Old 07-25-2020, 02:45 PM   #37
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Seminars at the fall rally by the vendor that provides the tires for most keystone products has said time after time that the PSI of the tires should be set to the psi indicated on the specific tire. The G614 says 110 and our are set at 110.

And I am not positive he knows what he is talking about, reason I say that is that Goodyear ,Sailun etc have inflation charts according to weight. You may very well run 110 psi , I don't . I haven't for the12 years I have run G rated tire rated for 110 psi. Although I don't go by the weight chart , I don't run 110 psi either.

I had a lengthy talk with a Sailun rep. ,and he stated there is nothing wrong inflating the Sailun S637's to the psi according to whatever weight they had on them. Even emailed me the inflation chart for Sailun.

Evidently when that vendor was talking ,he wasn't on the same page or talked to Sailun on what they thought of inflation.
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Old 07-25-2020, 03:09 PM   #38
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Is there a chart other than this? And, would it make sense to have to know the weight for each wheel to adjust pressure according to weight? Wouldn't that weight on each wheel change with varying load configurations of the trailer?
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Old 07-25-2020, 03:19 PM   #39
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And I am not positive he knows what he is talking about, reason I say that is that Goodyear ,Sailun etc have inflation charts according to weight. You may very well run 110 psi , I don't . I haven't for the12 years I have run G rated tire rated for 110 psi. Although I don't go by the weight chart , I don't run 110 psi either.

I had a lengthy talk with a Sailun rep. ,and he stated there is nothing wrong inflating the Sailun S637's to the psi according to whatever weight they had on them. Even emailed me the inflation chart for Sailun.

Evidently when that vendor was talking ,he wasn't on the same page or talked to Sailun on what they thought of inflation.


I run mine at 110 psi and plan on continuing. Just thinking out loud referencing the comments by the Sailun rep; if he recommends pressuring the tire to carry the "load" that's on the tire is he not then saying you need no reserve capacity in the tire as a safety measure? Isn't that exactly what the RV manufacturers were doing, which caused who knows how many tire failures, prior to implementing the new RVIA 10% reserve capacity standard?


I would never dream of pressuring my tires to exactly what my weight was. I've not been to a scale that weighed each tire but what if, and it's probably true, one of the tires was weighted 10% more than another due to construction or loading? Entirely probable.

Just some observations in case someone was actually going to try to follow that chart without some consideration (I just looked at one). Of course to each his own but that seems to sure cut things too close, for me anyway. JMO
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Old 07-25-2020, 03:19 PM   #40
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Is there a chart other than this? And, would it make sense to have to know the weight for each wheel to adjust pressure according to weight? Wouldn't that weight on each wheel change with varying load configurations of the trailer?

No thats not it. Yes you would have to weigh each wheel, sure it would change, and it would be a hassle to follow the weight chart. My point is they don't have to be run at the max 110psi if the weight is not there.

Both of my last two fifth wheels have, and had 15,500 GVWR, doing the math I am no where near the weight rating on any wheel that my Sailuns are rated at , which is 4400 Lbs @ 110 psi .I run mine at 95-100.

Pretty sure I still have the Sailun weight chart in an email, would be more then happy to sent it to you .
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