10 ply tires?

Most 15" 6 lug trailer wheels today come rated for 80 psi unlike our older 15" trailer wheels that came in several lower psi ratings ie; 50 psi....65 psi.

A 15" load E tire is a good upgrade choice for a 15" 6 lug wheel.

Never over pressure a wheel or tire when carrying a load.

Two full years of stellar service and telling to ignore ENDURANCE recommendation. Right!

schlep1967 wrote:

Ex-Halfton Guy wrote:
Hello
Any issues going from d range 8 ply 65 psi to 10 ply 80 psi, on the stock rims on my rockwood 8281ws? Thanks

Crawl under the trailer with a flash light and a rag. Look at the back side of your rims for a max inflation stamp.

Good advice.

BTW: ignore the recommendation for Goodyear Endurance.

Ex-Halfton Guy wrote:
Hello
Any issues going from d range 8 ply 65 psi to 10 ply 80 psi, on the stock rims on my rockwood 8281ws? Thanks

And just so everyone understands: The term "ply" is used incorrectly.

Officially these tires are Load Range D and E. The obsolete term "Ply Rating" is sometimes used, but it is confusing because modern tires don't have 8 or 10 actual plies - which is why it was replaced - and it is even more confusing when the word "rating" is left out.

Rob, I was thinking that 15" E tires had a rating > 3k lbs, but that was for the 16s on my truck. At 2830 rating on your rims, they'll handle E tires at the full 80 psi. FWIW, both the Carlisle HD and the Endurance are 2833 lbs capacity in E rating.

Lyle

RobWNY wrote:
My old tires were rated for 65 PSI. My new ones are 80 PSI. I was told I'm just fine with what I did.

Let's try this one more time.

What the tires are RATED AT makes no difference.
What pressure are you ACTUALLY USING in them ??

If your load has not increased, you should NOT be upping the pressure just because the new tires could handle that if they needed to with extra weight.

YOU SHOULD NOT HAVE INCREASED THE PRESSURE JUST BECAUSE YOU PUT ON DIFFERENT TIRES. DID YOU DO THAT ??

Rob, You did the right thing, just like I did on mine.

laknox wrote:

RobWNY wrote:
I have a Forest River 5th wheel. The cousin to the Rockwood. It has the Aluminum rims and they are stamped "Maximum load 2830 pounds", the same as what's stamped on my new tires, but no mention of maximum pressure they can handle. I recently did just what you are wanting to do. I got rid of the **** D rated China tires and bought E rated Goodyear Endurance tires and I'm now rated to 87 mph and max cold inflation is 80 psi. I've seen 90 psi when traveling when the tires are hot. I don't have a lot of miles on them (about 400 miles so far) and I've had no issue at all.

AFAIK, at that weight rating, you have D-rated rims and would need to upgrade them to run full E-rated pressure.

Lyle

I inquired about this when buying the tires. The tire place with 100 years of existence and a staff with a lot of experience said they were putting in reinforced valve stems to handle the increased PSI. My old tires were rated for 65 PSI. My new ones are 80 PSI. I was told I'm just fine with what I did.

Ex-Halfton Guy wrote:
Hello
Any issues going from d range 8 ply 65 psi to 10 ply 80 psi, on the stock rims on my rockwood 8281ws? Thanks

The trailer’s original equipment wheels were used on your trailer because they will support the maximum load of the vehicle certified axles. Tires mounted on them with excess load capacity are just providing load capacity reserves. The wheels are not in danger for the tire excess load capacity unless the trailer axles are overloaded.

You need to insure the replacement tires are a compatible fitment to the OE wheels. Some wheels will have their maximum load capacity displayed somewhere on the wheel. Wheels marked like that will support a tire PSI pressure needed to meet the wheel’s maximum load capacity. Some wheels will have certified load and PSI values. When that is the case the PSI value cannot be higher than the wheel’s cold recommendation.

Wheel rim width MUST be compatible with the replacement tires acceptable width range. Valve stem PSI ratings are often overlooked when using replacement tires with higher recommended PSI values.

RobWNY wrote:
I have a Forest River 5th wheel. The cousin to the Rockwood. It has the Aluminum rims and they are stamped "Maximum load 2830 pounds", the same as what's stamped on my new tires, but no mention of maximum pressure they can handle. I recently did just what you are wanting to do. I got rid of the **** D rated China tires and bought E rated Goodyear Endurance tires and I'm now rated to 87 mph and max cold inflation is 80 psi. I've seen 90 psi when traveling when the tires are hot. I don't have a lot of miles on them (about 400 miles so far) and I've had no issue at all.

AFAIK, at that weight rating, you have D-rated rims and would need to upgrade them to run full E-rated pressure.

Lyle