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Cummins12V98

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Posted: 02/28/22 09:22am Link  |  Quote  |  Print  |  Notify Moderator

"What was Jayco thinking when they selected a load range E 80 psi tire for a big 16500 lb trailer. Especially a Endurance with those thin 8/32" of tread depth."




First thing what the HE!! does the tread depth have to do with the tires capacity?

Let's do some math. Let's assume a minimal 20% pin that would mean 13,200# on the axles. Take that by 4 and the per tire load is 3,300#. The ST 255/85 R16 has a rating of 4,080# @ 80psi. I think a 780# cushion is plenty.

GY intentionally built the tire with 8/32" tread dept to keep the tire running cooler and they determined most RVers will age out their tires well before they wear them out.

I run them on my Boat trailer and 4 years and well over 20k they still have plenty of tread left.

You always are thinking Commercial and i understand that.


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Posted: 02/28/22 10:26am Link  |  Quote  |  Print  |  Notify Moderator

"GY intentionally built the tire with 8/32" tread dept to keep the tire running cooler and they determined most RVers will age out their tires well before they wear them out."

Yes!! You should replace tires at 5 years or so. Tread means nothing!! I've run Endurance on my 5th wheel and tandem axle boat trailer for three years and never had a failure. Tire pressure is always a neglected item. So is lug nut torque........long sad story here!!

Retired JSO

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Posted: 02/28/22 01:21pm Link  |  Quote  |  Print  |  Notify Moderator

Only the GY 614 is G rated not the Endurance. For a low cost and reliable G tire, the proven Sailun 637 is what I would purchase.





Allworth

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Posted: 02/28/22 01:35pm Link  |  Quote  |  Print  |  Notify Moderator

Shallow treads typically run cooler. Note that racing tires have almost NO tread when just broken in!


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Cummins12V98

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Posted: 02/28/22 03:53pm Link  |  Quote  |  Print  |  Notify Moderator

Allworth wrote:

Shallow treads typically run cooler. Note that racing tires have almost NO tread when just broken in!


GY California rep I dealt with said they intentionally used 8/32".

JIMNLIN

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Posted: 02/28/22 06:54pm Link  |  Quote  |  Print  |  Notify Moderator

A load carrying tire with 8/32" of tread depth has nothing to do with running cooler.
The closer to the carcass gets the surface of the tread the hotter it will run when carrying heavy loads. Thats one reason commercial tires carrying heavy loads have thicker treads.

A load carrying tire vs a lite weight race tire. LOL...not even close to the same tire tech.

If the thin 8/32" of tread depth and only a load range E at 80 psi that is a very good reason Jayco switched to a commercial grade 17.5" load G tire for the 16500 lb Pinnacle. Hell the OPs 16500 lb Pinnacle 36FBTS with 4 tires thats 4125 lbs per tire. Dam good reason to go with a commercial grade load G tire.

With the 16" commercial grade all steel ply carcass load G the OP can expect 60k + miles of service. No one gets that kind of mileage from a load carrying tire with only 8/32" of tread depth.

The best reliable/grades of 16"/17.5" commercial grade tires first came out on commercial non rv trailers. Then many tire savy rv folks saw or heard the kind of service they can get out of that brand or that class tire and apply them to their heavy rv trailer....just like Jayco did by going with the much better 17.5" tires vs a boat trailer tire.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

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Cummins12V98

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Posted: 02/28/22 07:25pm Link  |  Quote  |  Print  |  Notify Moderator

16,500# 5er sure does not have 4,125# on each tire. Did you forget to subtract a minimum of 4,125# for the pin and most likely more?

Too funny as all I ever heard was the ENDURANCE was not on the mArket long enough. Back then the “THIN” tread was NOT an issue. Then a few years later the tread all of a sudden became an issue and that is all that can be said since the ENDURANCE has been on the market with a STELLAR RECORD for five years now.

Looks like a "Moderator" edited my post??????

Looks like I figured 25% pin and I should have used 20% that would be 3,300# and that would leave 13,200 on the axles divided by 4 would leave 3,500# on each tire. That would still make the ENDURANCE tire just fine to use.

* This post was last edited 03/01/22 10:18am by Cummins12V98 *   View edit history

joebedford

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Posted: 02/28/22 08:07pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

16,500# 5er sure does not have 4,125# on each tire. Did you forget to subtract a minimum of 4,125# for the pin and most likely more?
I have a 19,000 pound 5er with 3,080 on the pin. I think your calcs are off.

joebedford

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Posted: 02/28/22 08:13pm Link  |  Quote  |  Print  |  Notify Moderator

Retired JSO wrote:

Only the GY 614 is G rated not the Endurance. For a low cost and reliable G tire, the proven Sailun 637 is what I would purchase.
I have 6 Sailun S637 235/85R16STs on my 19000lb rig. Each tire carries about 2600lbs. I don't know if these tires are G rated or H, but each tire is rated at 4400lbs at 110 PSI. Tread depth is 10/32nds. It may be overkill but I don't have to worry about blowouts any more.

cummins2014

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Posted: 02/28/22 09:05pm Link  |  Quote  |  Print  |  Notify Moderator

joebedford wrote:

Cummins12V98 wrote:

16,500# 5er sure does not have 4,125# on each[emoticon] tire. Did you forget to subtract a minimum of 4,125# for the pin and most likely more?
I have a 19,000 pound 5er with 3,080 on the pin. I think your calcs are off.


Wondering the same , must be that new math . [emoticon]

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