Replacement Tires

[CALinSC]

Originally Posted by Cummins12V98

Not sure your point. I posted EXACTLY what GY tech Support told me to do if wanting to use the Tire weight/inflation charts instead of BLINDLY running MAX inflation.

This is for up sizing load range or if you have a RV that has PLENTY of tire capacity to run less than MAX.

I'm often misunderstood when posting about RV trailer tires. My information comes from government regulations and established tire industry standards.

RV trailer tires are any size and design the trailer manufacturer deems appropriate for that application.

RV trailer tires are governed by FMVSS (standards) and tire industry standards (ONLY!). FMCSA Regulations are not applicable with FMVSS.

So the inflation pressures found on the tire vehicle certification label are correct and minimum. Problem is, with RV trailers in the past there has hardly ever been any wiggle room as the vehicle manufacturers have fitted tires to your trailer with (sometimes) the very minimum required. Newer RV trailers will have a 10% increase in load capacity above the trailer's vehicle certified GAWRs.

The tire industry sticks by the vehicle manufacturer's original equipment tire load capacity. The do that with their canned statement found everywhere and goes like this. "Replacement tires MUST have a load capacity equal to or greater than the OE tires." Meaning by inflation.

Using replacement tires that do not conform to the OE tires load inflation chart are considered "plus sized tires." Once a new recommended tire inflation is determined for the plus sized tire it becomes the new minimum. The USTMA will allow any inflation pressures between recommended and tire sidewall max as OPTIONAL with the caveat, "Never use inflation pressures less than recommended minimum or what's on the vehicle certification label."

I can provide references if needed. They will be from FMVSS & USTMA.

Bridgestone/Firestone have a replacement tire PDF available on line that explains the procedures in much more depth and from the installers point of view. I don't keep such references once I have memorized the basics.

[porkchop]

It's good to finally get someone here that knows of which he speaks!!!!!!!!!!!THANKS

Bill

[Cummins12V98]

Repeating a bunch of government CYA info is not the real world. For example a triple axle DRV sure as HE!! will never need MAX inflation and using the tire/weight inflation chart is wise for better ride, traction and tire wear.

Most RV's need MAX inflation because they are using the tire as a way to determine rated load.

But hey if someone wants to blindly run what the "LABLE" says have at it.

[CALinSC]

Originally Posted by Cummins12V98

Repeating a bunch of government CYA info is not the real world. For example a triple axle DRV sure as HE!! will never need MAX inflation and using the tire/weight inflation chart is wise for better ride, traction and tire wear.

Most RV's need MAX inflation because they are using the tire as a way to determine rated load.

But hey if someone wants to blindly run what the "LABLE" says have at it.

Your arguments support zero load capacity reserves provided via inflation pressures.

RV trailer tires need those reserves so badly RVIA has mandated a 10% load capacity reserve for all RV trailers in production since mid 2016. Their inflation method differs from yours because yours is derived from FMCSA regulations and the RV trailer tire inflations are derived from FMVSS.

[Cummins12V98]

They may say they need reserves but they are covering for the POS tires that most of these RV's come with.

Run QUALITY tires and you can load to MAX weight/inflation without concern. Ya don't think they have a reserve built into what the weight/inflation charts dictate?

I run quality GY tires, always have in all load ranges "E" to "H". I have had ONE tire separation from a bad batch over many thousands of miles without even a flat.

Some I had needed MAX and some I have used the charts. All with perfect tread wear.

Like I said if ya want to run what they say blindly go for it! I use my God given brain with support from GY Tech Support.

[clev]

The Goodyear 215/75r17.5 g114 can be ordered through Discount Tire for $279.

[CALinSC]

Originally Posted by Cummins12V98

I use my God given brain with support from GY Tech Support.

I wonder how your GY tech missed this message right out of the current GY tire maintenance manual?

"Tire pressure should never be reduced below the vehicle manufacturer's recommended levels to support load conditions in order to improve the ride quality of a vehicle. The difference in ride quality is not significant. When minimum inflation pressure requirements are not met, tire durability and optimum operation can be affected."

[Cummins12V98]

I stand by EXACTLY what I said!

[Sudsysr]

Planning tire replacement in Spring 2021 on my MS 215 17.5. Currently have G114. Over $600 a tire in Canada where I live.
Following opinions of Sailun owners S265. Any update So?

[Cummins12V98]

So as mentioned $279 per tire thru Discount tire. Let's say you pay 30% premium that's still under $400 per tire.

Sailun has a good track record. I guess you need to decide if you want to support a Communist Chinese Company.

Continental is another option but not cheap as are Michelins.

I wonder if Copper makes that tire???

[Sudsysr]

Sounds like you still are ok with the Sailiuns.
I just can’t find much on them.
For Rv application and warranty.
They have a Corporate office in Canada ���� that I will call.
Haven’t looked at price detail.
Chinese manufactured.
Limited selection for size and application.
Continents does make a low boy trailer tire
Thanks

[Cummins12V98]

Personally I would NOT purchase the Sailun.

Looked and the Copper is made in China also.

[Cummins12V98]

Have the GY's given you any trouble? I am sure you can get a better price. Do you have GY Commercial Tire centers?

GY's are rated at 75mph and I "think" Sailuns are 65mph if that is of concern.

[CALinSC]

Originally Posted by Sudsysr

Sounds like you still are ok with the Sailiuns.
I just can’t find much on them.
For Rv application and warranty.
They have a Corporate office in Canada ���� that I will call.
Haven’t looked at price detail.
Chinese manufactured.
Limited selection for size and application.
Continents does make a low boy trailer tire
Thanks

Sailun PDF

http://www.gosailun.com/Content/images2/637/637.pdf

[Notanlines]

Those sorry Communist Chinese companies...Goodyear was the first global tire manufacturer to enter China when it invested in a tire manufacturing plant in Dalian in 1994. Goodyear is one of the world's largest tire companies. It employs approximately 66,000 people and manufactures its products in 49 facilities in 22 countries around the world.
Imagine what rotten, sorry dogs they are to do that!

[CALinSC]

The best way to find out where your tires or any others were built is by getting the tire’s plant code from the tire sidewall and looking it up in a plant code document.

In the picture; B9 = Michelin - Greenville, SC

http://www.harriger.com/tire4.htm

Attachment 1488

[Sudsysr]

Any comments on those using Sailuns appreciated

[Cummins12V98]

Join RV.NET

Plenty of people swear by them on there.

[wingnut60]

Ran the 17.5s on my 38RSSA for quite a while--also the 19.5s on one of my 450s. Very satisfied with them.

[MTK46]

I also have the 17.5's on my DRV. Installed them this summer in S.D. I run them at 95 psi very happy with them. These are lowboy tires not RV tires.