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Old 05-18-2014, 09:00 AM   #1
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Can I use more tire pressure?

I want to go to 15" LR D tires.

The current tires are at 50 psi and the GY Marathons would be at 65 psi.

I have looked all over the wheels and can't find anything about a max PSI for the wheel. How can I know if I am good?
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Old 05-18-2014, 09:04 AM   #2
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any brand info on wheel you can research?
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Old 05-18-2014, 09:16 AM   #3
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I think OC has those tires on his trailer which I thought was a Rockwood or flagstaff. He is always saying to put load range D on , so It is working fine for him.

And sometimes wheels have specs on the backside of the spokes

Ps. The 50 -65psi jump isn't quite like a 44psi-80 jump, im sure it will be fine.

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Old 05-18-2014, 09:21 AM   #4
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I have tried with no success.
Forest Rivers components list and manufacturers did not uncover anything either.

I took one wheel off to get any information off I could find. Nothing really useful, at least through Google yet. The trailer came with LR C Trail Express tires.

This is what I do know. Stamped on wheels -
Max 2150 LBS
SR WHEELS
SR0048 (or 4B?)
15X6 J L
DOT-T
Made in CHINA (Arg!)
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Old 05-18-2014, 09:53 AM   #5
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My old rims didn't show air pressure either but did show max load which was so close to my TT weight I replaced them along with the tires and went to the Maxxis 'E' tires.
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Old 05-18-2014, 10:11 AM   #6
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Quote:
Originally Posted by Orion View Post
I have tried with no success.
Forest Rivers components list and manufacturers did not uncover anything either.

I took one wheel off to get any information off I could find. Nothing really useful, at least through Google yet. The trailer came with LR C Trail Express tires.

This is what I do know. Stamped on wheels -
Max 2150 LBS
SR WHEELS
SR0048 (or 4B?)
15X6 J L
DOT-T
Made in CHINA (Arg!)
That is a 50 psi rim.

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Old 05-18-2014, 10:53 AM   #7
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So what happens if you exceed the rim PSI? If a rim is rated at say 65 psi and you go to 80 psi. Will the rim explode or have a catastrophic failure? Is the aluminum rim weaker that a rubber tire?

I replaced "C" rated 50 psi tires on a rim I am told was 65 psi rated with Maxxis "E" rated 80 psi tires. Can 15 or 20 psi really damage or cause a failure ?
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Old 05-18-2014, 11:21 AM   #8
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Quote:
Originally Posted by Airdale View Post
That is a 50 psi rim.

Airdale
Is that based on the actual rim or the load rating?
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Old 05-18-2014, 02:17 PM   #9
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Is that based on the actual rim or the load rating?
The load rating.

Retailers - such as Tredit - that provide tires and rims to the RV trailer manufactures often fit their tire & rim assemblies very close in load capacity. Plus sized replacement tires more often than not will also require rim upgrading. Here is a reference to ponder.

Modular

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Old 05-18-2014, 04:05 PM   #10
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I understand that when equipping tires and rims it is usually to rate them close together.

However, you cannot use the load rating of a rim to determine its max pressure.

Load rating has nothing to do with the max pressure of a rim as it does with a tire.

For example, the HI-Spec rims I have on my trailer have a load rating of 2150 lbs, but a max pressure rating of 80 psi. And that pressure rating was stamped on the back of the rim.
15x6 Series06 Aluminum Hi Spec Trailer Wheel 5 Lug, 2150 lb Max Load Free Shipping.

A steel rim I purchased at the same time for a spare, has a load rating of 2600 lbs but a max pressure of 60 psi.
15x6 White Spoke Trailer Wheel 5 Lug, 2600 lb Max Load

And the Dexstar steel rims that came on my trailer from the dealer, had a load rating of 2040 lbs and a max pressure of 65.
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