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Old 08-07-2015, 08:33 AM   #11
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Originally Posted by bethcb View Post
We are replacing the tires on our 2015 Pinnacle FBTS. The current tires size we have is ST 235 80R16. We are looking to purchase G614 tires with metal valves, size ST 235 85R16. ...
Hi bethcd.

Three things I would check and confirm for myself before making the switch.

1. PSI rating of the wheels - should be stamped on the inside of the rim.
2. Clearance - since the G614 are slightly larger in diameter, what impact will the increased size have with clearance with trailer and between tires.
3. Jayco warranty - since your sig indicates you have a 2015, I'm guessing it's still under Jayco's 2 yr warranty. Does changing tire size have any impact to Jayco's warranty. If Jayco says no impact - get it in writing.

Going with metal valves is an excellent and smart choose.

Note: IMO any tire may fail regardless of the manufacturer and there's no substitute for checking before every trip the tires for signs of cracks, etc. and maintaining proper tire pressure.

Hope this is of some help.
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Old 08-07-2015, 07:14 PM   #12
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Here is my honest opinion. Go with the G's never look back. Anyone who leaves ST E rated tires on 7k axles is asking for a here is your sign award.
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Old 08-07-2015, 08:58 PM   #13
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I just put the G614 tires on my Eagle Premier. My wheels are rated at 90 PSI according to Jayco. I could not find a PSI rating on my wheels, only a weight rating (3580 lbs). Recently I had the rig weighed getting individual wheel weights. The heaviest wheel was just under 3000 pounds with the fresh water tank full. According to Goodyear's inflation load chart I only need 80 psi in the tires. If I were to have 110 psi in the tires they would be overinflated. Call Jayco with your VIN and get your wheel rating, then get the rig weighed with individual wheel weights. If money is not an issue you can switch to 17.5 inch wheels and get the Goodyear G114. Clearance is not a problem as the G114 and G614 are nearly the same diameter.
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Old 08-16-2015, 07:53 PM   #14
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Got the new Goodyear G614

As a follow up to my initial posting, as you will recall, after a few thousand miles on the Rainier tires, we had a large bubble. Replaced that tire under warranty and went directly (50 mile) to get the G1614's installed. One of the other tires that they pulled off the trailer had a 6 inch bubble and tear near the inside of the rim. So glad we stopped to get new tires when we did.
I called Jayco and found that our wheels are rated for 90PSI. Jayco said they do not recommend any change in tire size (80 to 85) but that we could do it if we choose. They also said the same about these tires. It does not effect the warranty. We put on the Goodyear G614 tires on the Pinnacle and then noticed that the tire was just a bit too close to the fender. So, we just shaved down the fender a little bit and now have good tires on our Pinnacle and got rid of the junk that Jayco installed. If you have these Rainier tires, I would recommend replacing them as soon as possible. Hopefully we have lots of safe miles in store on these new tires!
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Old 08-16-2015, 08:20 PM   #15
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The wheel is a 16X6 8-6.5 aluminum split spoke wheel with a 0 offset. It is rated to 3580# at 80spi. These should be run at 80 psi. from Tredit tire the supplier to Jayco model #YF0366857T is the wheels they put on my 2015 31RETS,
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Old 08-16-2015, 08:28 PM   #16
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Yet to read a single post about wheel failure but lots of post about tire failure. Now we have weight police and wheel air pressure police.
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Old 08-16-2015, 08:45 PM   #17
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I've got a question about the Goodyear G614. Goodyear markets this as a trailer tire, but the tire size begins with "LT."

Can anybody reconcile this?
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Old 08-16-2015, 09:34 PM   #18
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My wheels on my 36RSQS also gave only a weight capacity. My friend that runs one of the local Discount Tires said he could warranty the junky Goodyear Marathons that came on my rig ( all 4 where bad ) and then advised me to go with G rated 85's TaskMasters. I asked him about the rims, and he stated that they have installed hundreds of these on factory wheels with metal valve-stems and 110 psi and never had a wheel problem. I have had them about six months, 800 miles, and no problem to date. I spent the extra for balancing, road hazard, and the metal stems, all for around $800. We don't travel much, RV stays in a park most of the year, so not on the road a lot. My Discount Tire buddy also said that the reason their are so many failures with ST tires ( other than China made ), is that they get a totally different treatment than lets say passenger car tires. 1, they don't get the same type of heat cycles that your daily driver gets, they get worked hard, then they stay cold for sometimes months. He stated that protecting them from the sun, and the ground is also very important for the life of the tire. And of course, as in all tires, maintaining proper air pressure. Hopefully some of this helps.
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Old 08-16-2015, 10:53 PM   #19
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Originally Posted by MOCamper View Post
Yet to read a single post about wheel failure but lots of post about tire failure. Now we have weight police and wheel air pressure police.
I don't really care what tire, tire pressure, wheel, or wheel pressure you choose to use. If you feel for a few hundred bucks that your family, my family, your trailer and your vacation are worth risking, then go for it. The wheels are stamped at a max pressure for a reason. When a wheel fails due to over pressure (and the stress induced due to the increase in dynamic loading) it's not pretty.

With the big fifth wheels we all paid in excess of $50k so why not shell out a few bucks extra for a decent wheel/tire combo. In my case that was for the 17.5" upgrade (130 psi rated wheel) and the Good year G114 tire. The peace of mind is priceless.
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Old 08-20-2015, 05:46 PM   #20
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Sure does make interesting reading on here. Seems like it depends on who you talk to at Jayco as to what answer you get. I just bought all new tires on my 2014 Eagle 33.5RETS. Nowhere on the rims was the tire pressure stamped. So we called Jayco. They would not or could not tell us and referred us to TBC, the distributor of a whole bunch of different tires. They could not or would not tell us the max inflation psi on the rims either. We wound up putting Gladiators back on the rig and got rid of the Towmasters. They are the same size, 10 ply, and run at 80 psi loaded. The tires on the dual axles are rated at 3,000 pounds each so that is 12,000 pounds. Our unit loaded only comes close to 10,000 so we should be good to go. That is static loading however and does not take into account running around curves, etc.
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