Tomax blowout

[sailor]

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.

[edatlanta]

Originally Posted by Camper_bob

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.

[norty1]

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.

[Jack 56]

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.

[RUSSELL5000]

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.

[P25ct]

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.

Safe travels!

[Quahog]

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.

[Jack 56]

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.

[P25ct]

That's great to hear Jack. Glad they did the math for themselves and stepped up. Nice work.

[KLGard]

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.)

[Jack 56]

KLGuard!
The guys at trailertiresandwheels.com were very helpful with options for my trailer. I think heavier tires and wheels will have minimal load difference on the axles since the axles ride on the tires and wheels. The Dexter axles site states the load rating for the axles, tires and wheels are limited to the lowest of the three capacities.

On the trailer I had before this 5th wheel I went through 2 sets of Goodyear Marathons due to tread separation.

[Jack 56]

P25ct, Jayco admitted to installing the wrong axles. They do not know how it happened but they installed 6000 pound capacity instead of 7000 pound. They also gave me credit for the defective Tomax tires to go towards my upgraded tires and wheels.

[SSBN608]

I can tell you the Jayco factory rims on my 3 axle TH do NOT allow for the upgrade to the 120psi tires.

I wanted to make that change, and probably should have, but elected instead ($$) to keep the wheels and put on Maxis M8008 ST radials, E rated at 80psi for 3,420lbs. I too have the 6,000lb rated axles. I hoped that the extra 420lbs rated per tire over the axle would give me enough margin to at least keep the tires round and full of air.

So far (13,500 miles into a 15,000 mile trip) so good. The tires (which I check pressure on and inspect every day) look great.

HOWEVER, my next rig/upgrade will have 17.5" wheels and G114 H rated tires.

[P25ct]

Just picked up the new 17.5 rims with G114 H rated Goodyears. My first impression at the freight dock when I saw them.. "WOW!" I'm used to looking at those E rated Towmax's. These are truly a truck radial in every respect. It's like a whole different ballpark. I HIGHLY recommend these for any 7k axle runners. I'll post pics when they're bolted on.

[MOCamper]

May I suggest anyone who does not want the expense of 17.5 wheels investigate the QR35 by Gladiator G rated 14 ply with steel belted sidewall. Just put them on my rig, and I'm transferring them to my new 377. They are rated at 3750lbs at 95 psi M speed rating. $786 out the door. Tire guy says farmers love them. I don't have any long term review for thr tire but can say the truck tires are warmer than the trailer tires after towing at 72 mph.

[Jack 56]

I got my 17.5s on Friday. I got the Sailun chinese tires. They are also a substantial upgrade from the stock Blowmax. Theses 17.5s are virtually the same size as the stock 16 inch wheels and tires. I will post pictures. The look, feel, and weight of these tires and wheels will make me feel much better about towing.

[Jack 56]

attached two more pictures.

[bankedtime]

Did you balance the new tires ?

[P25ct]

Mine were delivered balanced

[cariboocreek]

....and another 17.5" convert.....