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Old 03-08-2016, 08:40 AM   #61
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Originally Posted by TURBS View Post
https://www.etrailer.com/question-40711.html



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That says nothing about Rims and psi . but tires and psi . this is whats important rims are rated for carrying capacity not psi . tires are rated for both on my Truck i run e rated tires same as they came with max psi is 80 when i'm unloaded i run 65 rear 70 front when loaded it's 80 all the way around .my TH came with D rated tires for 65 psi when i put on the e rated which are rated for 80 psi that's what i use does not change because of the rim . the rim has a max weight rating not a psi rating
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Old 03-08-2016, 08:46 AM   #62
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Originally Posted by northstar1960 View Post
That says nothing about Rims and psi . but tires and psi . this is whats important rims are rated for carrying capacity not psi . tires are rated for both on my Truck i run e rated tires same as they came with max psi is 80 when i'm unloaded i run 65 rear 70 front when loaded it's 80 all the way around .my TH came with D rated tires for 65 psi when i put on the e rated which are rated for 80 psi that's what i use does not change because of the rim . the rim has a max weight rating not a psi rating

Really ?

If we are talking about # TW15BIAS5ON475, the wheel itself is rated for 2,150 pounds at 95 psi. The tire though is rated for 1,820 pounds at 50 psi which is the rating you will have to go by because it is lower.



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Old 03-08-2016, 09:02 AM   #63
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Originally Posted by TURBS View Post
Really ?

If we are talking about # TW15BIAS5ON475, the wheel itself is rated for 2,150 pounds at 95 psi. The tire though is rated for 1,820 pounds at 50 psi which is the rating you will have to go by because it is lower.



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i'd like to see a rating for psi on a wheel . it's weight . you can take a wheel rated at 1820 and at 50 psi put a e rated tire on it rated at 80 psi and run 80 psi you won't have issues unless you go over the rim weight rating .

the wheels are rated for weight the tires rated for weight and psi .
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Old 03-08-2016, 09:04 AM   #64
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The tires are LT275/65R18 Toya's 550KPG 80PSI Cold
The yellow sticker says P265/65R18 S cold pressure says 220kPa, 32PSI Front and Rear
Spare P265/70R17 S 240 KPa, 35 PSI.
Not sure why I have a 17 inch spare? that's crazy.

17" tires and wheels are much less expensive than 18" hence 17" spare


RE the change from P to LT.
Did someone mislead you into believing that it is the tire that carries the load? The reality is that it is the air pressure that supports the load. To hold the 80 psi used in Load Range E tires you need a completely different tire construction and in all probability you need different wheels too as your OE 18" wheels are probably rated for no more than 50psi and maybe not even that much.

Simply changing tire type on a "passenger" light truck doesn't result in the TV becoming a real HD truck.


Fuel economy is strongly controlled by the mass of the rubber you are deflecting (bending) as you drive down the road. I bet your LT tires are 50% to 70% heavier than your P type tires. Your truck probably even had to meet fuel economy standards which is one reason you got P type tires OE. Trucks have a different set of standards and requirements.
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Old 03-08-2016, 09:13 AM   #65
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Actually rim information is more complicated than tires. I try to keep posts to as few words as possible but often get super long winded.

The first responsibility for matching tires to rims belongs to the tire manufacturers. They must determine what rim is suitable for every tire they manufacturer. Then they must compile a listing and provide that listing to whoever is responsible for marrying the tire and rim selections together. They must also make the listing available to the public. Retailers have folders with such information.

The Society of Automotive Engineers (SAE) are responsible for setting the specifications for rims/wheels.

This is an excerpt from a Bridgestone/Firestone replacement tire manual (page 13). “Never exceed the maximum load capacity and/or inflation pressure of the wheel.

Bottom line; The information is on the rim in some form. Why? Because the vehicle manufacturer has certified it to be there.

This rim thing can go on and on because it’s in print in every regulation for all situations. So, IMO, the best answer is in the tire industry standards which says match the tire to the rim by size, load capacity and tire inflation pressure. If in doubt talk to a manufacturer responsible for such fitments.

Info was almost correct. The tire company is responsible for their tires mounting and sealing correctly against a wheel of a certain dimension on the tire/air chamber side. These dimensions are published in industry standards fro US Tire & Rim Association.
Tire companies have no responsibility in selecting or testing the strength of the wheel used. This selection is the responsibility of the company that selects the tires and wheels to be fitted on a vehicle. Usually the vehicle manufacturer or in the case of some RV trailers it is the axle manufacturer who provides tire/wheel assemblies so in that case it would be the axle mfg.
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Old 03-08-2016, 09:19 AM   #66
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Originally Posted by Tireman9 View Post
17" tires and wheels are much less expensive than 18" hence 17" spare


RE the change from P to LT.
Did someone mislead you into believing that it is the tire that carries the load? The reality is that it is the air pressure that supports the load. To hold the 80 psi used in Load Range E tires you need a completely different tire construction and in all probability you need different wheels too as your OE 18" wheels are probably rated for no more than 50psi and maybe not even that much.

Simply changing tire type on a "passenger" light truck doesn't result in the TV becoming a real HD truck.





Fuel economy is strongly controlled by the mass of the rubber you are deflecting (bending) as you drive down the road. I bet your LT tires are 50% to 70% heavier than your P type tires. Your truck probably even had to meet fuel economy standards which is one reason you got P type tires OE. Trucks have a different set of standards and requirements.
Wheels are rated for weight carrying capacity . you can take a wheel rated for lets say 2400 install e rated tires rated for 2830 and run 80 psi you just shouldn't go over the 2400 weight carrying capacity for the wheel of 2400 .Again i have never seen a psi stamp on any wheel only max weights
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Old 03-08-2016, 09:27 AM   #67
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Originally Posted by northstar1960 View Post
i'd like to see a rating for psi on a wheel . it's weight . you can take a wheel rated at 1820 and at 50 psi put a e rated tire on it rated at 80 psi and run 80 psi you won't have issues unless you go over the rim weight rating .

the wheels are rated for weight the tires rated for weight and psi .





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Old 03-08-2016, 10:14 AM   #68
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And what determine psi ? weight rating of the tire . again show me a rim stamped with a psi rating . you guys confuse the issues with garbage . can 't say how many times on thios site people have told others they can't go to a e rated or better tire because the rim may or may not be rated for the psi change . it's weight not psi for rims .the rim you list is rated c class at 3750 psi the tires is rated at 110 max psi this just shows that the rim will handle the class c tire rated at 3750 and 110 . i can take a rim rated for 3450 80 psi and pump it up to 110 and stay under the 3450 weight and be more then fine but good luck finding a e rated tire rated for 110 .
so back to not mis-leading folks if you TT has rims rated for 2830 lbs and it came with D rated tires that only go to 2380 putting on e Rated tires that are good for 2830 and 80 psi does not require new rims . unless you have rims with a weight rating much less then that . the PSI will not change the weight rating of the rim or will it cause a rim failure by increasing psi by 15 or more
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Old 03-08-2016, 10:30 AM   #69
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New 10 ply tires help

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Originally Posted by northstar1960 View Post
And what determine psi ? weight rating of the tire . again show me a rim stamped with a psi rating . you guys confuse the issues with garbage . can 't say how many times on thios site people have told others they can't go to a e rated or better tire because the rim may or may not be rated for the psi change . it's weight not psi for rims .the rim you list is rated c class at 3750 psi the tires is rated at 110 max psi this just shows that the rim will handle the class c tire rated at 3750 and 110 . i can take a rim rated for 3450 80 psi and pump it up to 110 and stay under the 3450 weight and be more then fine but good luck finding a e rated tire rated for 110 .
so back to not mis-leading folks if you TT has rims rated for 2830 lbs and it came with D rated tires that only go to 2380 putting on e Rated tires that are good for 2830 and 80 psi does not require new rims . unless you have rims with a weight rating much less then that . the PSI will not change the weight rating of the rim or will it cause a rim failure by increasing psi by 15 or more





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Old 03-08-2016, 11:03 AM   #70
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Great it shows max tire pressure ,wheres the weight rating ? and you know it's for a rim that's only rated for 1950 lbs . back to square one . weight is the determining factor not psi . show me a rim that states max rim air pressure allowed ? it's all determined by the weight the rim can handle . so when people ask how high of a load rated tire can i use on my rim the answer should be what weight is your rim rated for . mine are rated for 2830lbs with no rating for psi . so i guess it's only the cheap china bomb rims that have a psi rating . lmao
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Old 03-08-2016, 01:17 PM   #71
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I thought this thread was about VEHICLE wheels and tires......now we are talking about trailer wheels? Different rules, different specs etc...for them.
Everything i posted was for OE wheels.
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Old 03-08-2016, 03:16 PM   #72
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Your going to have to do better than that to prove me wrong. Because im saying it is not on most OE wheels.
I need factual proof to prove otherwise. (Like a number sequence, symbol etc)

If you're going to tell us and op that we need to know our rim ratings for switching tires, you need to have real proof as to how to find this!
What I'm saying is, do it yourselfers need to do a lot of homework when doing any kind of changes with their OE tires an rims, automotive or trailer.

I gave a reference with page number to a tire industry standard. What I quoted was not out of context. It was a factual statement from the reference.

If you're going to challenge information from FMVSS documents you're going to have to go and read them and put all the pieces together.

You can put any of these numbers in your browsers search engine. They are documents the vehicle manufacturers MUST apply before it can be certified.

571.109
571.110
571.119
571.120
571.129
571.139

Part 567 - certification is also referred to in most of the above documents (PDF)

p.s. The rim information is in them, Good Luck!

Bottom Line; What a vehicle owner does to his/her vehicle is his/her responsibility. Any outside instructions that may be binding by law will be in the form of state vehicle inspection regulations. CFR part 570.9 & 570.62 are the government's guide to those inspections.

This is now way too technical and will be my last post in this thread.
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Old 03-08-2016, 03:46 PM   #73
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Originally Posted by Airdale View Post
What I'm saying is, do it yourselfers need to do a lot of homework when doing any kind of changes with their OE tires an rims, automotive or trailer.

I gave a reference with page number to a tire industry standard. What I quoted was not out of context. It was a factual statement from the reference.

If you're going to challenge information from FMVSS documents you're going to have to go and read them and put all the pieces together.

You can put any of these numbers in your browsers search engine. They are documents the vehicle manufacturers MUST apply before it can be certified.

571.109
571.110
571.119
571.120
571.129
571.139

Part 567 - certification is also referred to in most of the above documents (PDF)

p.s. The rim information is in them, Good Luck!

Bottom Line; What a vehicle owner does to his/her vehicle is his/her responsibility. Any outside instructions that may be binding by law will be in the form of state vehicle inspection regulations. CFR part 570.9 & 570.62 are the government's guide to those inspections.

This is now way too technical and will be my last post in this thread.
Ok, yes we know that the manufacturers have to meet a certain spec and to have it approved to meet dot guidelines.
But back to the real question that was brought up, that you interjected on.
-You stated that a person can or should find these ratings prior to upgrading a tire on an OE vehicle wheel.
- I stated that most of the OE vehicle manufacturers wont give us the specs for load and psi ratings for the wheels.
---so basically im sensing that you are retracting your stance on this now since there is no way the gereral public or even the manuf. employees (like i was) are actually able to attain this info.

Op....thousands of people, and even the dealers and the manufacturers, use the same wheels with p, LT and even load range E tires all on the same wheels.
I feel confident in saying, with out a doubt that you will have no issue with a LT E tire on your wheels.
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Old 03-08-2016, 03:59 PM   #74
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A 2830lb weight rating corresponds to 80 psi. They are one in the same.


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Old 03-08-2016, 04:58 PM   #75
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A 2830lb weight rating corresponds to 80 psi. They are one in the same.


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yes 2830 is a e Load rated trailer tire for 15 " rims and most all if not all e rated tires run at 80 psi max load . now my TH came with 24xx D rated tires .
the labels on the side of the TH state to tire size 255/75/15 D rated and state a max psi of 65 . that does not mean you can't put on E rated tires as the rated weight of the rim is 2830. PSI matters not .
for argument sake if i could get a C rated tire in 225/75/15 i could put that on also and run 110 psi as long as i stay with in the weight limit of the rim of 2830 there would be no issues other then a very harsh ride .
Bottom line psi is not a damaging factor in Wheel failure over weight is
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Old 03-09-2016, 09:42 AM   #76
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I disagree. You put 110 in a stock C aluminum rim and you are asking for a heap of trouble.


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Old 03-18-2016, 07:19 PM   #77
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My 2008 Tundra has been running Cooper 275/65.R20 E tires for a few years and is my daily driver. 45PSI on all four corners for daily driving and when towing our GVW 9300# 5R front stays at 45psi and the rear tires go to 65PSI. Tires are wearing well, they get rotated every 5k miles. Trailer has Maxxis ST225/75/R15 E that are run at 70PSI. Average 10MPG towing, 18MPG not towing mixed driving
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Old 03-18-2016, 07:32 PM   #78
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Ive run them on a 50 mile trip and they are a little swim y at 45lbs but if I put 50lbs in them it throws my sensors off. I'm afraid it will blow out the packing if left there. The pressure did go up about 5 lbs after they warmed up. Ill try that next trip. I got a little sway but I think the front of the trailer was a little high putting to much weight on the rear tires. Ill readjust that also. That racket the receiver hitch makes drives my wife and kids nuts though.
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Old 03-19-2016, 12:12 AM   #79
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OkOp....thousands of people, and even the dealers and the manufacturers, use the same wheels with p, LT and even load range E tires all on the same wheels.

I feel confident in saying, with out a doubt that you will have no issue with a LT E tire on your wheels.
The rules for replacement tires are called "tire industry standards".

Searching for answers there are a little more complicated because not all are published on the internet.

Wheels/rims are not required to have their specifications, other than size, displayed on them. Tire manufacturers are required to describe the appropriate rim for each tire they manufacturer.

Tire industry standards say this in every instance for replacement tires: "Never exceed the maximum load capacity and/or inflation pressure of the wheel."

The very best reference I can find on line is from
Bridgestone/Firestone tires. It's lengthy, and complicated for people without a mechanical background. From it you have to fit the situation to the replacement tires selected. It describes the notations to be made in the vehicle owner's manual and the use of an auxiliary tire placard for the replacement tires.
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