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azdryheat

Tucson, AZ

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Posted: 08/20/19 06:41pm Link  |  Quote  |  Print  |  Notify Moderator

No, my trailer doesn't shake itself to death. I run E rated truck tires and keep the PSI at 70. My take on it is the excessively high air pressure in those G rated tires is causing the tire to act like it's made of solid rubber. With no flex in the tire of course it's going to bounce around. Let out some air.


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laknox

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Posted: 08/20/19 09:28pm Link  |  Quote  |  Print  |  Notify Moderator

pyoung47 wrote:

Last fall, I installed a set of Sailun tires on my Montana, upgrading to G rated tires. I’m running only 90-95 pounds in the tires. They are shaking the camper quite a bit. Last week, we cravked three crock pots on the way home. Does anyone else experience this?


WAY overkill on the tires. Bet it's placarded for D tires, so E tires would have been much more appropriate. I'd say run them at 70-80 and see how it rides. Sell the Sailuns and get some Endurance.

Lyle


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Me Again

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Posted: 08/20/19 10:36pm Link  |  Quote  |  Print  |  Notify Moderator

laknox wrote:

pyoung47 wrote:

Last fall, I installed a set of Sailun tires on my Montana, upgrading to G rated tires. I’m running only 90-95 pounds in the tires. They are shaking the camper quite a bit. Last week, we cravked three crock pots on the way home. Does anyone else experience this?


WAY overkill on the tires. Bet it's placarded for D tires, so E tires would have been much more appropriate. I'd say run them at 70-80 and see how it rides. Sell the Sailuns and get some Endurance.

Lyle


OEM tires 235/80R16E
Shipping weight 9,870
Carrying cap 3,995
Hitch 1,865

One would be hard pressed to load 4K of "stuff" into it. So dry axle weight is 8K, throw a ton at it and axles are most likely under 10K.

This trailer would do better with Endurance ST235/80R16E's at 80 psi.

Chris


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ACZL

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Posted: 08/21/19 01:31am Link  |  Quote  |  Print  |  Notify Moderator

My thought is that OP went from a E tire to a G tire, 80 psi to 110psi (even tho he's at 90-95 psi). G tire is designed for far more weight than he has thus causing mre bounce due to a stiffer tire. I also agree on: does he have shocks? Also, perhaps adding (unless on already), Mor-Ryde CRE 3000 susp and wet bolts.

Like Dutch, our Big Country is 41' long and weighs 14k dry, 16k loaded and has Sailun tires aired up to 110. Rides great and nothing has broke. We have a cutlery set that spins around on counter by stove (on a slide) and since we put it there 2 years ago, it hasn't move.

So I feel that OP needs to go back to a E tire and 80 psi.


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pyoung47

MO

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Posted: 08/21/19 04:15am Link  |  Quote  |  Print  |  Notify Moderator

I agree that the E rated tires would ride better. I was just tired of babying my tires and I actually did have a blowout with the original E tires, although they were past their "use by" date. Everyone seemed to recommend the Sailuns, and I do like having a tough tire, but they may be too tough. I may try running at lower pressure, since they do provide a chart for pressure/weight. The rig can gross around 14,000, and I'm probably approaching that at times when we are loaded for a craft show. Thanks to all for the thoughts.

JIMNLIN

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Posted: 08/21/19 06:15am Link  |  Quote  |  Print  |  Notify Moderator

JMO but from my experience I would say way too much tire for the job.

The Sailuns (4080 -4400 lbs capacity) work best for 7k and 8k axles but not the best idea on trailers with light loaded 6k-5.2k axles.

I got into the over tire issues on my tandem axle cargo trailers with 5.2k axles with 15" OEM load C tires.

My other trailers (heavier) with 6k-7k axles had 16" tires so I moved both cargo trailers (our job site tool trailers) to 16" E tires. After that move we found tools scattered all over the trailers floor. At that time we had many 15" LT tires available so went to a 15" C load tire. No more tools shook loose from their hangers/shelves.

I would put those G load Sailuns on CL and use that money to re tire the trailer with a 16" LT E Bridgestone R-238 commercial grade all steel ply carcass like the Sailuns if they fit or a ST E tire like the Provider....Endurance....Carlisle HD in that order. These are a better class ST tire than what we used 6-8 years ago.


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Me Again

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Posted: 08/21/19 09:53am Link  |  Quote  |  Print  |  Notify Moderator

pyoung47 wrote:

I agree that the E rated tires would ride better. I was just tired of babying my tires and I actually did have a blowout with the original E tires, although they were past their "use by" date. Everyone seemed to recommend the Sailuns, and I do like having a tough tire, but they may be too tough. I may try running at lower pressure, since they do provide a chart for pressure/weight. The rig can gross around 14,000, and I'm probably approaching that at times when we are loaded for a craft show. Thanks to all for the thoughts.


Lucy's craft show "stuff" must be rocks! Have you weighed the rig with her rocks on board? Or is "probably" the key statement!

* This post was edited 08/21/19 05:47pm by Me Again *

laknox

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Posted: 08/21/19 09:57am Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

laknox wrote:

pyoung47 wrote:

Last fall, I installed a set of Sailun tires on my Montana, upgrading to G rated tires. I’m running only 90-95 pounds in the tires. They are shaking the camper quite a bit. Last week, we cravked three crock pots on the way home. Does anyone else experience this?


WAY overkill on the tires. Bet it's placarded for D tires, so E tires would have been much more appropriate. I'd say run them at 70-80 and see how it rides. Sell the Sailuns and get some Endurance.

Lyle


OEM tires 235/80R16E
Shipping weight 9,870
Carrying cap 3,995
Hitch 1,865

One would be hard pressed to load 4K of "stuff" into it. So dry axle weight is 8K, throw a ton at it and axles are most likely under 10K.

This trailer would do better with Endurance ST235/80R16E's at 80 psi.

Chris


Wow! That trailer certainly didn't look like it has a near-14k GVW! Yeah, E tires all the way, fully inflated. Sailuns are just overkill.

Lyle

laknox

Arizona

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Posted: 08/21/19 10:08am Link  |  Quote  |  Print  |  Notify Moderator

JIMNLIN wrote:

JMO but from my experience I would say way too much tire for the job.

The Sailuns (4080 -4400 lbs capacity) work best for 7k and 8k axles but not the best idea on trailers with light loaded 6k-5.2k axles.

I got into the over tire issues on my tandem axle cargo trailers with 5.2k axles with 15" OEM load C tires.

My other trailers (heavier) with 6k-7k axles had 16" tires so I moved both cargo trailers (our job site tool trailers) to 16" E tires. After that move we found tools scattered all over the trailers floor. At that time we had many 15" LT tires available so went to a 15" C load tire. No more tools shook loose from their hangers/shelves.

I would put those G load Sailuns on CL and use that money to re tire the trailer with a 16" LT E Bridgestone R-238 commercial grade all steel ply carcass like the Sailuns if they fit or a ST E tire like the Provider....Endurance....Carlisle HD in that order. These are a better class ST tire than what we used 6-8 years ago.


Yeah, with 16" wheels, the Duravis would be an excellent choice. I did find it interesting that the Endurance is a 123 load rating (3,417 lbs) with an 80 mph speed rating but the Carlisle HD is a 124 load rating (3,547 lbs) but has a 75 mph speed rating.

I also find it interesting that the Maxxis 8008 is the most expensive in this size at Discount Tire, by $33/tire over the Endurance. Has a 124 load rating, but no speed rating is given by DT, though we all know that they're still only rated to 65 mph.

Which Provider do you like?

Lyle

topjimmy

Washington Coast

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Posted: 08/21/19 10:49am Link  |  Quote  |  Print  |  Notify Moderator

I have a 40ft Montana with Sailuns for 4 years traveling all over the West Coast and I do not feel much bouncing I run mine at about 110 P.S.I. my Montana also has the Mor-Ryde SRE4100 Susp.and I think that helps also my tires are not even balanced on top of that so you must be going over some nasty roads


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