Good Sam Club Open Roads Forum: Towing: Hartland TIres
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jffnkrn

peoria

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Posted: 03/29/22 10:43am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

jffnkrn wrote:

Cummins12V98 wrote:

ST 235/80 R16 E has a rating of 3,420# @ 80psi.

What is the actual weight on your RV tires? You simply will not find a better RV tire and it's US Made.


4400 lbs @ 110 psi


That's the weight rating "of the tires", not the weight per wheel/axle.

And contrary to what was said, unless you're pushing the "minimum" pressure for the weight, at, say, 80psi on a 14pr tire, running them at 80 psi (or something reasonable, less than 110 psi max, if not needed) will no hurt the tires one bit.


funny, I just left Discount tire to get yet another opinion on what they installed. Stated that the Goodyear comparable tire is twice the cost at around $400 per tire. Also stated that at minimum should be kept at what the tire pressure rating on the tire is, (110 psi), but as he said their store can only air up to 90 psi max. Another one of those things that make you go HMMM. Well, already bought, I will deal with it, and all should be good. the compressor I have in my tool box gets me to about 60 or 65 for emergencies, but I will look for another better one. We all have opinions and getting five different people will of course get 7 to 10 different views. my next call will be to the manufacturer, if lucky enough to get info from them.
Have a great day.

jffnkrn

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Posted: 03/29/22 10:47am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

jffnkrn wrote:

Cummins12V98 wrote:

ST 235/80 R16 E has a rating of 3,420# @ 80psi.

What is the actual weight on your RV tires? You simply will not find a better RV tire and it's US Made.


4400 lbs @ 110 psi


That's the weight rating "of the tires", not the weight per wheel/axle.

And contrary to what was said, unless you're pushing the "minimum" pressure for the weight, at, say, 80psi on a 14pr tire, running them at 80 psi (or something reasonable, less than 110 psi max, if not needed) will no hurt the tires one bit.


oops, forgot to mention, Thanks Grit Dog. I don't think the tires will be hurt at 80 or so PSI either, my overall normal travel weight in the trailer is about 15,400 full of water, propane, food etc.
I am comfortable knowing there is enough capacity in the tires for the trailer on it's own.

Grit dog

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Posted: 03/29/22 12:20pm Link  |  Quote  |  Print  |  Notify Moderator

jffnkrn wrote:


oops, forgot to mention, Thanks Grit Dog. I don't think the tires will be hurt at 80 or so PSI either, my overall normal travel weight in the trailer is about 15,400 full of water, propane, food etc.
I am comfortable knowing there is enough capacity in the tires for the trailer on it's own.


You're welcome! And just trying to be helpful.
Based on your weight (you said TT, but I'm presuming 5ver), either way, subtract the approx tongue/pin weight, which will put you around 14klbs or less actually on the tires. At that weight 80psi (cold) is aboot right, but also at that weight, I would run them a little on the high side. Just general methodology for care of trailer tires (that live a different life than vehicle tires).
Regarding Discount's "opinion", all I can do is LOL. And I'll leave it at that.
Regarding being able to air them up yourself on the road and able to reach that 80-90psi effectively, "most" 12V plug in compressors will at a minimum struggle with that from a duty cycle standpoint. Some of the upper end ones will do the job, but still slowly.
IMO, unless you're prepared to plug leaks etc and then need to air back up, it's not worth getting a compressor that will do the job well.
On the road somewhere, I'd just roll to a tire shop if I needed some air. It's one of those, be prepared to fix on the road, or that's why you carry a spare, type of thing.
If you really want the ability to air up high pressure tires even somewhat efficiently, need to look at getting a small 120V compressor or prepare to spend 2x as much for a 12V one and have a good connection for the DC power.


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Grit dog

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Posted: 03/29/22 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

jffnkrn wrote:

my next call will be to the manufacturer, if lucky enough to get info from them.
Have a great day.


Presumably, you've already been pulling this trailer just fine and just got new tires?
Mfg isn't going to give you any more useful info than is already available. Load/inflation charts and weight.
Seems like you're overthinking this a bit?

Cummins12V98

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Posted: 03/29/22 12:30pm Link  |  Quote  |  Print  |  Notify Moderator

jffnkrn wrote:

Cummins12V98 wrote:

ST 235/80 R16 E has a rating of 3,420# @ 80psi.

What is the actual weight on your RV tires? You simply will not find a better RV tire and it's US Made.


4400 lbs @ 110 psi


NOT what I asked. Try this, what amount of weight is setting on each tire? Didn't ask for carrying capacity.

Sounds like you have already bought the tires???


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JIMNLIN

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Posted: 03/29/22 01:15pm Link  |  Quote  |  Print  |  Notify Moderator

My experience has been just the opposite. When I had five service trailers/28 tires on the road for a living using the same axles/tires/wheels on a rv trailer we learned the expensive way the folly of derating especially a G tire to 80 psi or a E tire to 65 psi.

Were not talking small TTs or just experience with a couple of rv trailers or a utility trailers with load C/D/E tires on 3.5k/5k/6k axles but load G 14 ply rated tires that can weight 60-70 lbs per tire. These tires are heavy/very stiff sidewalls.

A 15400 lb trailer can have a 3200-3300 lb hitch weight which leaves around 12000 on the trailers axles = 3000 per tire. Now add a good 15 percent reserve capacity = 3450 lbs per tire. These numbers are a approx vs actual scaled axle loads so numbers will vary.
Now add 10-15 psi for a good reserve pressure to combat inter ply shearing forces.
Its been my experience you will get better long term service (miles and years) with 90-95 psi or even max sidewall pressures than at 80 psi.


"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers

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Cummins12V98

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Posted: 03/29/22 01:23pm Link  |  Quote  |  Print  |  Notify Moderator

Four years and at least 20k on my Boat Trailer with ENDURANCE 65psi tires towing at 70-75 most every day during the Summer months. They run nice and cool and the tread is perfectly even all across the tread all this running 50psi. God save me!!! [emoticon]

jffnkrn

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Posted: 03/29/22 01:59pm Link  |  Quote  |  Print  |  Notify Moderator

Cummins12V98 wrote:

jffnkrn wrote:

Cummins12V98 wrote:

ST 235/80 R16 E has a rating of 3,420# @ 80psi.

What is the actual weight on your RV tires? You simply will not find a better RV tire and it's US Made.


4400 lbs @ 110 psi


NOT what I asked. Try this, what amount of weight is setting on each tire? Didn't ask for carrying capacity.

Sounds like you have already bought the tires???



yes already a purchase, of course while on the road, Discount will take care of me if decided to change out. they are communicating with me, from the corporate office. no worries there. just concerned of not knowing any history on the Hartland Tire. as far as weight rating, I am in good shape with these according to info. Trailer gross is at 16K, we are about 15400 as a normal full of water etc. so that is less than 4000 per tire, and it had the westlake at 3520. so just more info for more info and thoughts!!!

Cummins12V98

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Posted: 03/29/22 02:12pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the post. I assumed you were wanting info "prior" to making a purchase.

Get your real weights and use the chart and add 5psi. Or as CapriRacer has mentioned take your load and add 15% then use the chart number without adding anything.

Grit dog

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Posted: 03/29/22 02:23pm Link  |  Quote  |  Print  |  Notify Moderator

jffnkrn wrote:




yes already a purchase, of course while on the road, Discount will take care of me if decided to change out. they are communicating with me, from the corporate office. no worries there.


Or, since you're actively recreating, and already bought the tires forget about this thread, forget about the Discount tire corporate office.
You have new tires that have enough air in them as long as they're at least at 80psi. You have nothing to worry about!

CHeers!

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