Not sure [Tires again]

[donewithtruckin]

Unable to find out rating on my aluminum rims, 235/80/16. Putting on G rated tires that require 110 lbs air! There must be a code, because there's no numbers! Thanks

[tinner12002]

john&bet wrote:

Second Chance wrote:

laknox wrote:

donewithtrucking wrote:
Unable to find out rating on my aluminum rims, 235/80/16. Putting on G rated tires that require 110 lbs air! There must be a code, because there's no numbers! Thanks

Often times the load info is stamped =inside= the rim, usually in the "valley". Means you have to break down a tire to find it.

Lyle

Mine were stamped on the inside "valley" as well - but a call to the Grand Design support folks who had my VIN and all the info on the components was easier. Your manufacturer may be able to do the same for you before you pay for the tires and/or pull a tire off a rim to check.

Rob

My I ask why G rated tires on a 5th that has a GVW of 13995?

Nothing wrong with have some cushion/safety zone between RV weight and tire rating so as to not having a possibility of overloading your tires.

[CALandLIN]

Tire industry standards are normally very consistent. The problem is sometimes caused by the date of the document. This reference is dated 2016.

On page #63 you will find their explanation for maintaining the vehicle manufacturer’s tire inflation pressures for all Original Equipment tires and like sized replacements.

Click Here!

[JIMNLIN]

Yeah....the same one ton DRW trucks we tow our rv's with and the same 3500/4400/5200/6000/7000/8000 lbs Dexter/Rockwell American axles and 15" and 16" trailer wheels and tires we use on all rv and non rv trailers this size. We don't use rubber torsion axles doing this type work as they don't stand up long term.

Your right...max pressures isn't the best idea in all cases and info like rvsafety.com says....
*quote ..... tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.*

In other words instead of derating the G tire to 80 psi their recommending 90-95 psi at a minimum.

What Goodyear is saying is basically the same thing.

[fj12ryder]

JIMNLIN wrote:

My advise comes from actual experience(s).
With five trailers on the road 24/7 and 28 tires on the ground for over eleven years running (some with 2 sets a year worn out) gave me and my drivers first hand experience of the folly of over tiring a trailer and then derating that tire with low pressures.
Lost tread caps/tread separations/blisters from high heat at highway speeds and high rolling resistance were usually the result.

Best long term service will come from a properly fit tire with 10-15 percent reserve capacity to the trailers axle system.
Goodyear tire says it best...

Goodyear Tire and Rubber .... weighing RVs
Special Considerations

Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up

Well, they do recommend running less than sidewall pressure if the conditions warrant it. And most of the people running lower than sidewall pressures are doing it to make the trailer ride smoother. So Goodyear says it's okay.

I take it those "five trailers on the road 24/7 and 28 tires on the ground for over eleven years" were all 5th wheel RV's which are relevant to our discussion. If they were Semi-trailers, not so much.

[JIMNLIN]

fj12ryder wrote:
I guess we'll just have to agree to disagree. 🙂 Real world experience vs what the "internet experts" suggest.

I wonder if there are any actual incidences they can point to that were caused by running a "G" rated tire on a 5th wheel at a lower pressure. Or if this is mainly speculation.

My advise comes from actual experience(s).
With five trailers on the road 24/7 and 28 tires on the ground for over eleven years running (some with 2 sets a year worn out) gave me and my drivers first hand experience of the folly of over tiring a trailer and then derating that tire with low pressures.
Lost tread caps/tread separations/blisters from high heat at highway speeds and high rolling resistance were usually the result.

Best long term service will come from a properly fit tire with 10-15 percent reserve capacity to the trailers axle system.
Goodyear tire says it best...

Goodyear Tire and Rubber .... weighing RVs
Special Considerations

Unless trying to resolve poor ride quality problems with an RV trailer, it is recommended that trailer tires be inflated to the pressure indicated on the sidewall of the tire. Trailer tires experience significant lateral (side-to-side) loads due to vehicle sway from uneven roads or passing vehicles. Using the inflation pressure engraved on the sidewall will provide optimum load carrying capacity and minimize heat build-up

[Cummins12V98]

fj12ryder wrote:
I guess we'll just have to agree to disagree. 🙂 Real world experience vs what the "internet experts" suggest.

I wonder if there are any actual incidences they can point to that were caused by running a "G" rated tire on a 5th wheel at a lower pressure. Or if this is mainly speculation.

Like I said GY Tech Support told me it's recommended to do so. Better braking, better ride and better tire life. I'm guessing they are full of Barbra Streisand!

I could be wrong but the chart I had 85 was the lowest pressure.

[Second_Chance]

JIMNLIN wrote:

Safety margin and peace of mind -

A maximum safety margin of a load G/110 psi tire over the E/80 psi tire comes at max pressures.
Derate a load G tire to 80 psi and the safety margin isn't there.

I like these folks recommendations when the owner over tires a trailer above 10-15 percent over axle ratings;

rvsafety.com

Tire Load and Inflation Ratings

Note: Towable – Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together – tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.*

And


fifthwheelstreet.com

Step #5..
Selecting the Correct Tire Pressure for Your Trailer
We at Fifth Wheel St. no longer recommend adjusting trailer tire inflation pressure below the maximum load PSI rating molded on the sidewall (and only if the wheel/rim is appropriately rated) regardless of the measured scaled weight of individual tire or axle positions for all multi-axle trailers.

However, we do strongly recommend weighing individual trailer tire positions to ensure none of the axles or tire positions are overloaded. Reports have shown that trailers do not have equal weight across all tire positions. Some RV load configurations may reveal as much as 20% difference between the front and rear axle. This especially true for Toy Haulers. It is possible that mismanaged trailer load distribution will cause one end of an axle or a tire to be overloaded. It has been stated, but never confirmed by any RV Weighmaster, that there are many RVs traveling on the road with at least one tire or axle side overloaded. The only way to ensure tires and or axles are not overloaded is to weigh each tire position on your trailer. Unfortunately, attempting to obtain accurate individual tire position weight is practically impossible at all truck scales. View our list of recommend RV Weighmasters here.

- See more at: http://fifthwheelst.com/step5.html#sthash.FIAc3k0Z.dpuf

I think you jumped to some conclusions without sufficient information. I don't think I ever said what inflation pressures I was running nor what my actual loads on each wheel are. The rig has MOR/ryde independent suspension 7,000 lb. "axles" (x2) under it and we have quite a bit of weight on each wheel (per the certified Escapees SmartWeigh wheel-by-wheel program). Per the trailer specialists that installed the tires (not a tire dealership nor an RV dealership... commercial and working trailers), they recommended 100 PSI per the load charts and my weight bill. That's what I run. The rig handles extremely well in this configuration and I'm not worried about tires or suspension.

Rob

[Me_Again]

See if you can find the wheel on this site. It lists the capacity based on number of lugs and size.

http://www.tredittire.com/wheels

Chris

[fj12ryder]

I guess we'll just have to agree to disagree. 🙂 Real world experience vs what the "internet experts" suggest.

I wonder if there are any actual incidences they can point to that were caused by running a "G" rated tire on a 5th wheel at a lower pressure. Or if this is mainly speculation.

[JIMNLIN]

Safety margin and peace of mind -

A maximum safety margin of a load G/110 psi tire over the E/80 psi tire comes at max pressures.
Derate a load G tire to 80 psi and the safety margin isn't there.

I like these folks recommendations when the owner over tires a trailer above 10-15 percent over axle ratings;

rvsafety.com

Tire Load and Inflation Ratings

Note: Towable – Travel Trailer/ 5th Wheel owners Due to the severe use conditions experienced by tires when axles are very close together – tire industry experts recommend maximum (sidewall) inflation pressure for towable tires unless this causes a sever over-inflation situation (20psi+), often referred to as the ‘basketball effect’. If this is your situation allow a 10 – 15psi safety margin above the minimum required inflation pressure.*

And


fifthwheelstreet.com

Step #5..
Selecting the Correct Tire Pressure for Your Trailer
We at Fifth Wheel St. no longer recommend adjusting trailer tire inflation pressure below the maximum load PSI rating molded on the sidewall (and only if the wheel/rim is appropriately rated) regardless of the measured scaled weight of individual tire or axle positions for all multi-axle trailers.

However, we do strongly recommend weighing individual trailer tire positions to ensure none of the axles or tire positions are overloaded. Reports have shown that trailers do not have equal weight across all tire positions. Some RV load configurations may reveal as much as 20% difference between the front and rear axle. This especially true for Toy Haulers. It is possible that mismanaged trailer load distribution will cause one end of an axle or a tire to be overloaded. It has been stated, but never confirmed by any RV Weighmaster, that there are many RVs traveling on the road with at least one tire or axle side overloaded. The only way to ensure tires and or axles are not overloaded is to weigh each tire position on your trailer. Unfortunately, attempting to obtain accurate individual tire position weight is practically impossible at all truck scales. View our list of recommend RV Weighmasters here.

- See more at: http://fifthwheelst.com/step5.html#sthash.FIAc3k0Z.dpuf

[Cummins12V98]

donewithtrucking wrote:
Unable to find out rating on my aluminum rims, 235/80/16. Putting on G rated tires that require 110 lbs air! There must be a code, because there's no numbers! Thanks

If you are replacing "E" tires the "G" tires do NOT REQUIRE 110psi. Use the weight inflation chart and add 5psi to what the chart says based on weight on tires. This is per GY Tech support.

I went from "E" to "G" tires and I ran the G's at 85 psi for thousands of miles with perfectly even tread wear and they ran cool.

MAX psi is NOT always required psi!!!

[Second_Chance]

john&bet wrote:

Second Chance wrote:

laknox wrote:

donewithtrucking wrote:
Unable to find out rating on my aluminum rims, 235/80/16. Putting on G rated tires that require 110 lbs air! There must be a code, because there's no numbers! Thanks

Often times the load info is stamped =inside= the rim, usually in the "valley". Means you have to break down a tire to find it.

Lyle

Mine were stamped on the inside "valley" as well - but a call to the Grand Design support folks who had my VIN and all the info on the components was easier. Your manufacturer may be able to do the same for you before you pay for the tires and/or pull a tire off a rim to check.

Rob

My I ask why G rated tires on a 5th that has a GVW of 13995?

Safety margin and peace of mind - and two of the original Es had been trashed and the set needed to be replaced, anyway. Was only a few dollars more to put the Sailuns on than to get hold of the original WestLake "Super ST" load range Es.

Rob

[donewithtruckin]

Thanks for all the replys! I'm spending the big bucks on sailum , cause I have PSD going down the road. The cheap Japanese tires are scattered all over I95 I77 and I79, I've had enough! I know sailum are Chinese, but what a solid sidewall. I hope my rims will take it!

[john_bet]

Second Chance wrote:

laknox wrote:

donewithtrucking wrote:
Unable to find out rating on my aluminum rims, 235/80/16. Putting on G rated tires that require 110 lbs air! There must be a code, because there's no numbers! Thanks

Often times the load info is stamped =inside= the rim, usually in the "valley". Means you have to break down a tire to find it.

Lyle

Mine were stamped on the inside "valley" as well - but a call to the Grand Design support folks who had my VIN and all the info on the components was easier. Your manufacturer may be able to do the same for you before you pay for the tires and/or pull a tire off a rim to check.

Rob

My I ask why G rated tires on a 5th that has a GVW of 13995?