Max psi rating for 2022 Cougar 364bhl wheels?

Jmckaycr · 03-15-2022, 04:41 AM

Im looking to upgrade my tires on my 5th wheel. I’ve been looking around at sailun tires but they are 110 psi tires. Anyone know if the wheels can support them? Im aware that I will need metal valve stems. Side note I’m also wanting to use gm trailer tire pressure sensors. I believe they go to 100lbs what happens when the tires are rated at 110? Thank you.

wiredgeorge · 03-15-2022, 05:01 AM

Quote:

Originally Posted by Jmckaycr

Im looking to upgrade my tires on my 5th wheel. I’ve been looking around at sailun tires but they are 110 psi tires. Anyone know if the wheels can support them? Im aware that I will need metal valve stems. Side note I’m also wanting to use gm trailer tire pressure sensors. I believe they go to 100lbs what happens when the tires are rated at 110? Thank you.

Your rims may have a pressure rating stamped on the inside. Take a look. As far as TPMS rated for 100 PSI and 110 PSI pressure, you kinda answered your own question. You may not be able to use the GM sensors if they don't register the 110 PSI.

CedarCreekWoody · 03-15-2022, 05:10 AM

You don't have to run tires at the max PSI rating, just be sure to run them at least as high as the rating stamped on the camper.

**flybouy** · 03-15-2022, 06:00 AM

If you want the extra capacity a higher rated tire affords then that can only be accomplished by inflating the tire to itmax rating. Otherwise, why upgrade?

Check with the wheel manufacturer for max pressure rating. Some wheels have it cast on the inner facing spokes or hub. If GM lists their sensors as 100 psi max then I would take that as the definitive answer.

**JRTJH** · 03-15-2022, 07:10 AM

I believe your Cougar has Tredit T-03 wheels as OEM. You'll need to verify that with a visual inspection of the rear surface of your wheels. Here's a photo of a T-03 15" wheel which shows the weight rating for the 5 lug (2150) and the 6 lug (2830) configurations...

Your wheels should have the information you're looking for cast into the rear of the spokes. Pull a wheel to confirm as the spoke "backside" is not visible when installed on the trailer hub...

Here's the link to the Tredit info: https://www.tredittire.com/wheel/t03/

As for the GM TPMS sensor units, if they're rated to 100 PSI, they won't read pressure above that level, but they will sense pressure above that level. If your truck "dash unit" can be adjusted to a variable alarm setting, you can only go to 100 PSI, and the sensors will alert you when the pressure falls below the alarm setting... It will not "protect you from running tires intended to be operated at 110 PSI if they actually have pressure at 101 PSI, so, they will "alert you when the pressure falls below their maximum rating but will not alert you as long as the pressure is above the 100 PSI level.

If I were you, I'd contact a GM parts department and see if there are sensors available that have a higher "max pressure capability"... I'd suspect they are available, just not normally used as OEM installs.

bsmith0404 · 03-16-2022, 05:52 AM

Another option to consider. If you have the T03 wheel or similar and it is rated for 95 PSI, you could go with a Carlisle LRF tire. They only require 95 psi. When you get them up to temp during towing, you will run above 100, but not by much. The GM sensors will let you know if you drop below 100, which is enough to indicate that you have a problem. Your Cougar empty weight is only 9k on wheels. That’s only 2,250. Once you’re loaded up it’ll be more than that, but I doubt you’ll ever see more than 2600 per tire. The LRF is rated for 3960, more than enough tire for your application.

travelin texans · 03-16-2022, 07:28 AM

IMHO I'd go with the max 110lbs on the Sailuns if your wheels will handle it simply due to your 14k lb GVWR, dry/shipping weights mean nothing to you once you picked it up from your dealer. Believe me if you use that much trailer regularly you'll have it loaded to the max much sooner than later.
I'd also recommend skipping the GM TPMS if it'll only go to 100! Go with a system that goes at least 10-15% more than the tire max pressure, but also reads temperatures as that's a concern on trailers more so than vehicles. I wanted a system that read temps & pressure at a glance & not have to scroll through other vehicle info or find the app on my phone. I had & would recommend the TST507 system.

**sourdough** · 03-16-2022, 08:10 AM

I think the first order of business is getting under there and seeing what those wheels are rated for - or pull one. 95, 100, 110? Until you know you're not accomplishing anything looking at tires.

Your trailer comes with ST235/80r16LRE tires rated 3420lbs. @80psi it appears. Unlike some others I will not deduct the pin/tongue weight to determine what weight the tires need to carry. It's a recipe for a blowout since the weight(s) on those tires will vary a LOT while driving over hill and dale. I go with GVWR of the trailer plus 15% if the components will allow it. For your 14k trailer that would be 14000 x 1.15 = 16,100 total lbs./4 tires = 4025 per tire. That is very close to the rating of an LRG tire at 4080lbs. The trick is if the wheel will support that much pressure. Hopefully your wheels will at least support 95 psi. (LRF) which would be better than the LREs.

When I upgraded from LRF tires on this trailer (14,3xx gvwr) to Sailun LRGs I had a couple say it was overkill (the LRF would support the full trailer weight) and would "beat the trailer to death". Not so, the LRGs don't harshen the ride any that I can tell and they did allow for the capacity reserves I wanted AND my wheels would support it. How you choose to approach the upgrade is up to you but more importantly it is totally dependent on what your wheels will support.

bsmith0404 · 03-16-2022, 09:25 AM

Only problem with going too heavy on tires is they don’t give. Tires are part of the suspension. Too much tire and you create a lot of extra jarring inside the RV. RV suspensions are getting better at reducing harsh road conditions, but they still leave a lot to be desired, you need the the tires to flex some.

Jmckaycr · 03-21-2022, 07:20 AM

Looks like my wheels are rated for 3520lbs. So I suppose for now that I’ll be going with the endurance till the next round when I change wheels. Crawling around under there I noticed my axels are 6k. For a gvwr of 14k that surprises me. Thanks

jsb5717 · 03-21-2022, 07:28 AM

My axles are also 6K. Seems a little underrated to me as well. But the OEM does figure that you are carrying over 2K of weight on the truck…so basically they are giving us the bare minimum axle they can get away with.

travelin texans · 03-21-2022, 07:40 AM

Quote:

Originally Posted by Jmckaycr

Looks like my wheels are rated for 3520lbs. So I suppose for now that I’ll be going with the endurance till the next round when I change wheels. Crawling around under there I noticed my axels are 6k. For a gvwr of 14k that surprises me. Thanks

At what tire pressure?
If your new heavier rated tires are rated for 3520lbs at 80 psi and your wheels are only rated for 65 lbs then you haven't gain a thing other than now running heavier rated tires under inflated.

Jmckaycr · 03-21-2022, 07:47 AM

Quote:

Originally Posted by travelin texans

At what tire pressure?
If your new heavier rated tires are rated for 3520lbs at 80 psi and your wheels are only rated for 65 lbs then you haven't gain a thing other than now running heavier rated tires under inflated.

My wheels are rated for 3520lbs each. Which from what I’ve read equals to 80psi each. So for now I’m stuck with the endurance tire because they are 80psi tires. If Im not thinking of something please let me know. Thanks

bsmith0404 · 03-21-2022, 07:47 AM

Quote:

Originally Posted by travelin texans

At what tire pressure?
If your new heavier rated tires are rated for 3520lbs at 80 psi and your wheels are only rated for 65 lbs then you haven't gain a thing other than now running heavier rated tires under inflated.

Definitely check the psi rating. I believe most, if not all 6 lug wheels are rated for at least 80 psi and some for 95 psi. I don’t think you’ll find any that are 65 psi, but still good to know if it’s 80 or 95. I’m assuming you have 6 lug wheels since you have 6k axles. No, not all 3520 wheels are 80 psi.

jsb5717 · 03-21-2022, 07:58 AM

My 6K axles came with 8 lug wheels rated at 110psi. The OEM tires were F rated with a max of 95psi. Upgrading to Sailun G tires was easy. Can 6 lug wheels come with a 110psi rating since the 6 lugs (vs 8 lug) also limits it’s load rating?

bsmith0404 · 03-21-2022, 08:03 AM

Quote:

Originally Posted by jsb5717

My 6K axles came with 8 lug wheels rated at 110psi. The OEM tires were F rated with a max of 95psi. Upgrading to Sailun G tires was easy. Can 6 lug wheels come with a 110psi rating since the 6 lugs (vs 8 lug) also limits it’s load rating?

I’ve never seen a 6 lug rated for 110 psi. It’s also unusual for 6k axle to have 8 lug hubs. They make them, but it’s usually someone changing the hub to an 8 lug vs coming with them. You may have 7k axle that’s been derated.

**sourdough** · 03-21-2022, 09:13 AM

The trailer in my sig came with 6k axles, 8 lug hubs and 110psi wheels. GVWR of the trailer is over 14k. It came with LRF tires. The axles were below the minimum I wanted in weight capacity, the brakes didn't work as well as I wanted them to and the LRF tires that came on it I didn't want either. They absolutely do put on the bare minimum for axles on many of their trailers.

After one trip to FL all of the above came off and new 7k Dexter axles, MorRyde suspension w/wet bolts, disc brakes, springs, Xfactor braces (3) etc. were installed. I had put Sailuns on it before it left the lot. When I was having this done the folks at Performance Trailer Braking said the 8 lug wheels on the 6k axles wasn't "that" unusual and certainly welcome. At the time he thought I would be reusing them but when I told them to just pull everything off under the trailer and replace it it didn't matter. I knew it had 6k axles before I bought it and the axle replacement was planned, all the other stuff just seemed to make sense.

CWtheMan · 03-21-2022, 10:22 AM

Quote:

Originally Posted by Jmckaycr

Looks like my wheels are rated for 3520lbs. So I suppose for now that I’ll be going with the endurance till the next round when I change wheels. Crawling around under there I noticed my axels are 6k. For a gvwr of 14k that surprises me. Thanks

The GY Endurance tires, sized ST235/80R16 are rated at 3420# at 80 PSI. They do not qualify to replace tires with a 3520# load capacity.

Look at your trailer's specs. The vehicle manufacture's recommended tongue weight is deducted from the GVWR before the axles are rated.

Axles are rated to carry the load of the vehicle's certified GAWRs. It is the only legal standard for trailer axle fitments. The vehicle manufacturer's tire selections are the minimum size and load capacity and will remain so for the life of the trailer unless the GVWR is increased by certified modification.

Wheels do not have to carry a load capacity greater than the vehicle's certified GAWRs. However, they must have a PSI rating equal to or greater than the PSI of the tires if they are going to be inflated to a PSI rating higher than the maximum wheel PSI rating.

I'm not guessing, I'm providing valid tire industry standards as they are currently written.

(There is no limit on tire load capacity reserves. However, RVIA has recommended 10% above vehicle certified GAWRs for all original equipment fitments by the vehicle manufacturer.)

(Plus sizing is an industry standard when using tires larger than the OE tires. An example, the ST235/85R16 when used as a replacement for a ST235/80R16 is a plus sized tire and industry's standards for their use should be followed. Using a ST225/75R15 LRE to replace a LRD is not a plus sizing action. It just adds increased load capacity reserves. Inflation charts for designated tire sizes are consistent with the designated size.)

Jmckaycr · 03-21-2022, 02:49 PM

Quote:

Originally Posted by CWtheMan

The GY Endurance tires, sized ST235/80R16 are rated at 3420# at 80 PSI. They do not qualify to replace tires with a 3520# load capacity.

Look at your trailer's specs. The vehicle manufacture's recommended tongue weight is deducted from the GVWR before the axles are rated.

Axles are rated to carry the load of the vehicle's certified GAWRs. It is the only legal standard for trailer axle fitments. The vehicle manufacturer's tire selections are the minimum size and load capacity and will remain so for the life of the trailer unless the GVWR is increased by certified modification.

Wheels do not have to carry a load capacity greater than the vehicle's certified GAWRs. However, they must have a PSI rating equal to or greater than the PSI of the tires if they are going to be inflated to a PSI rating higher than the maximum wheel PSI rating.

I'm not guessing, I'm providing valid tire industry standards as they are currently written.

(There is no limit on tire load capacity reserves. However, RVIA has recommended 10% above vehicle certified GAWRs for all original equipment fitments by the vehicle manufacturer.)

(Plus sizing is an industry standard when using tires larger than the OE tires. An example, the ST235/85R16 when used as a replacement for a ST235/80R16 is a plus sized tire and industry's standards for their use should be followed. Using a ST225/75R15 LRE to replace a LRD is not a plus sizing action. It just adds increased load capacity reserves. Inflation charts for designated tire sizes are consistent with the designated size.)

What would you recommend? The Goodyears are 100lbs off at 3420lbs. I went to Big o Tire today and they said the wheel ratings basically were a non issue. If the valve stems held the pressure they said it was good. I’m trying to make an informed decision but its getting a bit crazy. I would like sailuns but they aren’t ok for my wheels. I have rainier tires on it right now that came with the camper. I have an upcoming trip and dont need any issues. Thanks

**sourdough** · 03-21-2022, 04:38 PM

Lots of flurries here. Cut to the chase for your tires. Your wheels are rated for 3520 by your inspection. Your 364BHL comes with 235/80r16LRE tires rated at 3420lbs. Your wheels are rated for 3520....makes sense. What does the placard on the driver side front corner of the trailer say? It will give you the tire size and pressure recommendation. I figure it will say 235/80r16LRE @80 psi. If that is the case your wheels won't support more than the LRE tires, just pull off the OE and put on a good brand. It doesn't appear, from this flurry of posts, that you can get much more than that.

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