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Old 07-29-2015, 10:15 PM   #21
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Jayco told me my rims are rated at 90 psi. We put metal valve stems on and are running the tires at 100 psi. Others have told me they are doing this with good results. At 100 psi the g614 is rated 3550 lbs at 75 mph which is about the same weight as the TowMax tires I took off (3520- 80 psi at 65 mph). I drive about 62 mph max. The difference is the G614 is a heavier tire with a much tougher sidewall.

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Old 07-30-2015, 05:12 AM   #22
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Originally Posted by Camper_bob View Post
I'd like to know this too. I'm wondering if the wheel may be a limiting upgrade factor for some of us?
My wheels show on the inside (you have to crawl under and look from the inside) that they are rated for 110 psi. I know others have said their wheels are not. I guess I am lucky, but I would still upgrade to G614's even if I had to buy new wheels. I decided I would not tow another mile with the original "E" rated tires.


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Old 07-30-2015, 06:58 AM   #23
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My rims are all rated at 110 psi. I had metal stems already for use with the TPMS.
When my last E Marathon blew, I was literally looking at the tire monitor when it came apart with no warning.
Tread came apart.
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Old 07-30-2015, 09:35 PM   #24
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Sailor, I would not be comfortable with over pressurizing the wheels. I would not want to take on the liability if something bad happened. Hopefully you will have no problems.
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Old 07-30-2015, 10:14 PM   #25
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As someone pointed out above, the practice of the majority of the RV manufacturers is to use components (axles, suspension, wheels, tires, etc.) to the maximum or slightly over. The number of trailer tire failure threads is uncountable; suspension system components failure threads are almost as common.

I just came to accept that overhauling was part of the cost. New axles, shackles, bushings, wet bolts, shocks, wheels, and tires. Now everything is at 70% or less of capability. I also use LT rather than ST tires.

I still torque lug nuts, check tire pressure with a gauge, etc., as well as use a TPMS.

I call this the "cost of clean underwear." Closely related to having enough truck to tow with.
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Old 08-01-2015, 12:10 PM   #26
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Yesterday I ordered my three pairs of Goodyear G114s (H rated radials) mounted on 17.5" Aluminum rims. Caps nuts mounted balanced hi press stems: shipped 3600$. Have had Blowmax on my '14 Seismic since last April. Not much mileage and no visible crowning or bubbling but not willing to play the wait and see game. Money well spent. I think a G614 16" Goodyear G rated tire would have been ok on the stock rims, but I wanted the extra headroom and stability of the H. The 114 tire has Incredible reliability reports, better than that of the G614. Either way, much better than an E Blowmax on a 7k axle. Highly recommended. Waiting for them to arrive so I can get them mounted. I will have a set of 110psi rated 16" aluminum rims (6) for sale here soon with or without the tire. Let me know I'm advance of interested. 8lug.

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Old 08-03-2015, 06:02 AM   #27
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I just installed a set of these on our rig and put almost 2,000 miles on them already. Gotta say I'm loving them and you just can't put a price on the peace of mind.
Mike, Sue, Sissy and Little Man

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Old 08-03-2015, 07:07 AM   #28
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My 17.5 inch wheels and tires will be here this Friday. Jayyco is sendig new 7000 pound axles to a local RV repair shop.
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Old 08-03-2015, 07:20 AM   #29
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That's great to hear Jack. Glad they did the math for themselves and stepped up. Nice work.
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Old 08-03-2015, 07:31 PM   #30
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We have 8 lug with a max capacity of 3580lbs. The max psi is 80. When you upgrade the rims and tires, you need to be sure your axles can handle the additional weight also. We have 6000 lb axles, so our options for increasing our wheels and tires are limited. We recently replaces the TowMax tires with Goodyear Marathons. (all we could get while traveling.)

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