Aluminum Wheels - Pressure Limits

[moutard2]

I'd like to replace the Goodyear Marathon tires (235/80R16) which came with my new 3750FL with Goodyear G614's. The 614's need to be inflated to 110lbs. Will the rims handle this pressure? Alternatively, is there another tire that I should be considering? All the negative comments everywhere on the web has me running as fast as my old legs will take me from the chinese made tires. Thanks!

[CamillaMichael]

Members have commented in this forum that the rims have either a "stamp" or a "sticker" on the inside (have to get under the trailer to see the reverse side of the wheel) of the wheel stating it was rated for 110lbs. Since reading this, I just have not got around to comfirming this is true...but I have no reason to doubt what other members have written. I am also sure you will get input from other members on alternative tires. Something that a number of MOC members have written is that you need to make sure the tires you are buying as replacements have at least the load capacity of the tires you are dumping.

[Ozz]

Here you go:
Posted - Nov 24 2010 : 07:39:08 AM
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Here is the info for those who may need it:
(An e-mail copy from Treadit)
If you would be so kind as to email me your address I can send you a letter and stickers for you to affix to the backside of your wheels indicating the re-rated weight and tire pressure.
Thank you and have a great day
Jennifer
Tredit Tire and Wheel ElkhartSales@tredittire.com
574-293-0581 Ext:135
jmiller@tredittire.com

[pineranch]

Check a spoke on your rims. Mine have 110 psi and 3750 stamped on the inside of a spoke. If you ever need that much tire pressure you have probably exceeded your axles weight rating.
Mike

[moutard2]

I think the idea is to run trailer tires at their maximum psi rating to maintain the integrity and strength of the sidewalls which are stressed during highway and other speeds. I would always run an 80 psi tire at that pressure and 110 psi in a G614RST tire regardless of the GVW of the trailer.

[firetrucker]

The radial tire is an air spring and the sidewall is designed to flex. If you run the pressure too high, you will have a very stiff spring and will not have the handling that you should. You will very probably get premature wear in the center of the tread and a much stiffer ride for the Monty.

You will also have no margin for the pressure to increase on very hot days. I think Goodyear recommends 10 psi increase under certain circumstances, but they have a table of pressure versus load that would be good to look at.

Remember that the Firestone problem ocurred because people overinflated their tires and made the vehicle unstable.

Bob

[exav8tr]

I have the 614's and only run 95psi based on the Goodyear Tire and Loading Chart. This is based on the weight on my axles. Overinflation is just as bad as underinflation and you might end up beating your trailer to death.

[moutard2]

Many thanks for all of your feedback folks. Is the G614 the right tire for my unit?

[moutard2]

Please confirm for me that the 235/85R16 Michelin XPS Rib rated at 3042lbs.(single) would be inadequate to run on my dual axle trailer shipped from the factory at 12,201lbs.

[exav8tr]

Many folks use that tire. Remember your pin weight should not be included in the figures for your tire loading. Example: Total weight of trailer = 14,600 (fully loaded and ready to roll), your pin weight may be 2600lbs. Weight over your axles is 12,000 lbs, limit for your tires is 12,168 (4 X 3042). You would be within weight limits HOWEVER, not much safety margin.... THIS IS JUST AN EXAMPLE AND NOT TO BE USED AS ACTUALS NUMBERS. ACTUAL NUMBERS WILL VARY DEPENDING ON HOW YOU LOAD YOUR TRAILER AND THE GVWR FROM THE FACTORY. Personally, I want more of a safety margin as each time you hit a bump in the road it will temporarily increase the load on your wheels and tires. Now IF all the roads we travelled were nice and smooth, that would not be an issue, BUT, I'm just saying........

[Waynem]

To the original question.

Pull one tire off and dismount the tire from the rim. I'm not sure when it started, but Keystone required TRedit to re-certify all the rims made for keystone. On my 2008 Monty, the inside of the rim after dismounting the tire had a sticker that had the 110 PSI rating and at what inflation amount. I was having Michelin Ribs put on and that is why I saw the rating. I questioned Tredit and the responded that the rims were rated for 110PSI. However, you will see emblazoned into the metal rim the old 80psi. So to be legally safe, check to see if the sticker is there, and if not call Tredit like Ozz did and get some stickers to put in there. It is better to put them on the inside of the mounted tire so wear and tear will not deteriorate them.

I'm not sure how all this might fit in, but some vehicle inspection station "could" check and if the sticker is not there and you are over inflated or over loaded, it could cost you some time, and maybe money.

Good luck.

Edited: Here is a link to the Thread Replaced My Tires

It's a good thread to read, but here is the bottom line from Tredit:

"Good Morning Wayne,
I got some answers on the concern you had with that sticker on your wheel. What happened is that Keystone wanted that 3042lbs wheel re qualified to meet the 3750lbs standards so in the event of that happening, those specific wheels had to be stickered to be identified. They had to be stickered because of the sense of urgency by Keystone until new wheels were manufactured and stamped 370 lbs. (wm - I think she means 3750)

We appreciate your concern and bringing this forward to us. Please let me reassure you that the tires and wheels you have on your unit are correct and are rated for your unit. The tires (you had) and wheels are matched up per the specs on your unit.

Thank you again,

Kelly Weidner
Warranty Manager
Tredit Tire and Wheel Co., Inc.
PH: 866-443-9907
FAX: 574-294-3239
kweidner@tredittire.com"

[lcarter]

Moutard2,
I have run Michelin ribs for over a year and about 12,000 miles with no problem. I keep them inflated to 80 psi. IMO they are some of the best qualityu you can buy.