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Old 01-18-2015, 10:03 AM   #31
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I have the 15" Sumec rims as described in this post, with a weight capacity of 2150 lbs. These are the OEM rims that came with my Rockwood 8289WS. You can find these rims advertised online as Lynx rims. What you cannot find is a maximum PSI rating for this rim, either online or via a tire and wheel shop. So, you have to make a choice if you intend to keep these wheels AND upgrade load range short of contacting Sumec (good luck with contacting Sumec by the way). Your 1st choice is to follow the tons of experience you can read on this forum and/or through virtually every tire/wheel shop you contact, and that is the wheels can handle either 65 or 80 PSI. Your second choice is to by a wheel with a known PSI rating as some will recommend as mandatory in matching a tire with a wheel.

After blowing a Trail Express China bomb, I recently mounted the Carlisle Load Range E ST tires with bolt on steel valve stems, and had the tires balanced. I inflated to max tire pressure as recommended for ST tires, in this case 80 PSI. Tires run cool, no trailer sway, no problems.

I'm no tire man, but I have pulled trailers for the past 40 years and have a good working knowledge of tires and loads and I am very researched on this particular Sumec wheel topic. Good luck.
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Old 01-18-2015, 10:37 AM   #32
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Like MOJO13 I replaced the Trail Express LRC, went to the Maxxis 8008 LRE with steel valve stems, TPMS and balanced. I run them at 80 psi cold, so far so good with a little over 1000 mi. on them. Bought and had them mounted at Discount tire. I did ask the manager at Discount tire about the wheels, he said "shouldn't be a problem". I am following different sites with about the same thread as this concerning Sumec wheels and LRE tires @ 80 psi, have not read about any wheel failures as yet.
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Old 01-18-2015, 01:38 PM   #33
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I emailed Sumec with pics of all the markings I could find on the wheels, and asked about max tire pressure.

They never responded to either of the two emails I sent. I've had no issues at 65 psi with LRD's and don't expect any but, you'd think they could at least return an email.
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Old 01-18-2015, 02:13 PM   #34
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If it helps, I run G rated G614,14 ply Goodyear commercial tires on the factory style rims on my 44" work and play at 110psi. They suggest changing the rim but I have had no issues but use high pressure valve stems. the difference in weight rating and tire pressure that a D to an E rated tire is only a couple hundred pounds weight and 10-15psi cold. C to a D is more but wont make a difference anyway.
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Old 01-18-2015, 05:43 PM   #35
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I changed my Load Range C Trail Express(China Bombs) to Load Range E Carlisle with 70 psi and try to keep the mph to 60 on hwys.
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Old 01-18-2015, 07:31 PM   #36
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Quote:
Originally Posted by Timex View Post
I changed my Load Range C Trail Express(China Bombs) to Load Range E Carlisle with 70 psi and try to keep the mph to 60 on hwys.
Here is a reference all Carlisle trailer tire users should read and become familiar with.

http://www.carlisletransportationpro..._Practices.pdf


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Old 01-18-2015, 07:39 PM   #37
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Quote:
Originally Posted by Airdale View Post
Here is a reference all Carlisle trailer tire users should read and become familiar with.

http://www.carlisletransportationpro..._Practices.pdf


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Thanks for the post. Very interesting.
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Old 01-18-2015, 08:00 PM   #38
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This link has been on here before and I actually have it saved as a document.


I thought I read it thoroughly, did I miss something?


I would think it is good info for any brand of tire.
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Old 01-18-2015, 10:19 PM   #39
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Carlisle always recommends using full sidewall air pressures for their trailer tires.

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Old 01-19-2015, 09:49 AM   #40
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Quote:
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Carlisle always recommends using full sidewall air pressures for their trailer tires.

Airdale
So what is that?

I'm running 70 psi and I think the max is 80.
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