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RE: PSI of LT tire after upgrading from P rated tire

I haven’t seen the correct procedure yet so I’m going to write the way it’s supposed to be done. First, the replacement tires are required to provide a load capacity equal to or greater than what the OE tires provided as indicated by the certified recommended cold inflation pressures for them, depicted on the vehicle certification label. Second, the vehicle manufacturer already accounted for the 10% decrease in load capacity for “P” tires with their recommended cold inflation pressures for the OE tires. Third, you’ll need a load inflation chart for the replacement tires. With it you can set new recommend cold inflation pressures for the replacement tires with an inflation pressure that will meet the minimum requirements. Anything above your new recommended cold inflation pressures is optional all the way to tire sidewall max.
CALandLIN 05/26/20 03:39pm Tow Vehicles
RE: Recommended 16 inch LT tires for TT

I'm getting rid of our 15 inch Marathons on our TT and moving to 16in probably LT225/75R16 with new rims. I have people recommend 16 inch Michelin Defenders but those are well over $200 each. I see someone used GR Commercial T/A with good results but someone else suggested asking for ideas. Please don't restart the LT vs ST fight. You know the ST225/75R15 LRE provides more load capacity than the LT225/75R16 LRE by about 200# per tire. I don't know why you just don't pick a brand and go up to the LRE 15" tires that probably won't cause you to have to change wheels. The ST225/75R15 designated size can also be found with a LRF which is a steel cased tire. However, it would need wheels that would support the 95 PSI required for full load capacity (3195#) from the LRF.
CALandLIN 02/22/20 07:16pm Travel Trailers
RE: Load Range G Tires

I currently have Goodyear G614 tires on our fifth wheel (see signature). This is what came on the trailer when we bought it new in 2013. I am looking at new tires and am trying to understand why the G614 tires (235/85R16) have a diameter of 30.7 inches whereas all other 235/85R16 tires have a diameter of 31.7 inches. If I switch tire brands I don't know if a 1 inch larger tire will fit in my wheel wells. Does anyone know why the Goodyear G614 tires have a smaller diameter than every other tire brand? Even the Goodyear Endurance 235/85R16 has a diameter of 31.7 inches. (I have no intention of dropping to an E range tire - the Endurance is just an example). Thanks for any input. When in doubt, just measure your trailer's axle spacing, center to center. Dexter says 1" clearance is the minimum spacing for tires on their axles. I don't know about others.
CALandLIN 02/16/20 07:33am Fifth-Wheels
RE: LT tires on your TT? Let the fight begin

The builders of ST tires advertise them as having stronger sidewalls than like sized LT or P tires. To counter that, one would have to get a tire engineer to unequivocally dispute that so called “theory”. Until you can explain why they catastrophically fail at much greater rate than passenger or LT tires, I'll assume they are lying. Yes!
CALandLIN 02/15/20 01:49pm Travel Trailers
RE: Triangle Trailer tires?

Currently Triangle tires are built primarily in China. However, they are building a huge plant in NC. They were the first to build the steel cased ST225/75R15 LRF tire. Others have followed suit. Triangle NC
CALandLIN 02/15/20 10:07am Fifth-Wheels
RE: GoodYear G114 LHT

Anyone can put a brand out there. Double Coin, a popular long haul tire is $171.97.
CALandLIN 02/15/20 09:57am Fifth-Wheels
RE: LT tires on your TT? Let the fight begin

From the Michelin website FAQ Must I replace my present tires with the same size tires? Never choose a smaller size than those that came with the car. Tires should always be replaced with the same size designation, with approved or greater load carrying capacity or greater load carrying capacity -- or approved options -- as recommended by the vehicle manufacturer or authorized dealer. The way the question is asked puts Michelin or any tire mfg into a liability corner. So sure Michelin answer to this specific question will always be the same as the Q&A answer. Now if the question is worded differently such as in many emails from Michelin that have been posted on this website over the years we get a different answer such as this.... **In regards to the email you sent stating: I have a 2006 Montana 5th wheel Trailer that has two 6,000 lb Dexter axles and 4 deluxe aluminum Rims each rated at 3,042 lbs. I would like to install your Michelin XPS® Rib™ LT235/85 R16/E's on this 5th wheel. Will the tires be fully waranteed in this application? Answer..--------------------------------------------- We appreciate your request for information regarding the Michelin XPS Rib. The XPS Rib, size LT235/85R16/E, part number 13080 would be a good fitment for your 5th wheel. The tire carries 3042Lbs at 80-psi max pressure. For best pressure recommendation, run at maximum pressure until you can weigh your axles either call or reply to this email for a pressure recommendation. It is a good application, so there are no warranty issues. Your tires are covered under applicable warranty. We appreciate your business and thank you for choosing Michelin.** This is old stuff and this website has been through all this many times before with Cal who was posting same non sense as FastEagle back then. A 2006 Montana was always a bad analogy. More than half of them had LT235/85R16 LRE tires as OEM. Mission & Uniroyal were the primary brands of those LT tires.
CALandLIN 02/11/20 08:54pm Travel Trailers
RE: 5th wheel tires

The average consumer seeking replacement tires have no real reason to cross over to something different than what has been recommended by the vehicle manufacturer. When looking around the net at the many rv and non rv trailering websites (dozens) just about every member that asks the same old question about a better replacement tire than his OEM tires is looking for a better tire. There are no state/fed laws that enforces the tire placard or say we have to stay with the trailer mfg tire choices . The tire placard is required by law for the vehicle mfg to list his tire choices . These choices have to be on the trailer at first retail sales. After that the vehicle owner wants to upgrade the tires before making the first trip or replacing worn out/time out tires, he/she is under no legal obligation to use the same tire on the placard. The only legal aspect would be if the owner for whatever reason gets weighed and the tires capacity doesn't meet the actual load on them then he may receive a over weight ticket. IMO the tire placard is a good idea (a place to start) for those who don't have the experience or knowledge to choose a proper/safest tire for his/her tow vehicle or trailer. There are no state/fed laws that enforces the tire placard or say we have to stay with the trailer MFG tire choices. The tire placard is required by law for the vehicle MFG to list his tire choices. These choices have to be on the trailer at first retail sales. There are mandates from NHTSA that help enforce FMVSS (standards). The following is a verbatim quote from NHTSA, it's in all vehicle owner manuals. There is no reason to not know about it. "To maintain tire safety, purchase new tires that are the same designated size as the vehicle's original tires or another size recommended by the manufacturer. Look at the tire information placard, the owner's manual, or the sidewall of the tire you are replacing to find this information. If you have any doubt about the correct size to choose, consult with the tire dealer." Remember, size has nothing to do with brand.
CALandLIN 02/11/20 08:13am Fifth-Wheels
RE: LT tires on your TT? Let the fight begin

"Tires should always be replaced with the same size designation, with approved or greater load carrying capacity -- or approved options -- as recommended by the vehicle manufacturer or authorized dealer." The preceding quote is a tire industry standard. It's the primary reason reputable tire dealers and tire installers will not deviate from a designated size if the have to fit the replacement to a vehicle. The proper nomenclature description for any tire is on its sidewall. Therefore, a ST235/85R16 is not compatible with a LT235/85R16. Those are both completely different tires. The prefix (LT, ST, P) are officially part of tire's size designation. You don't believe that do you? People have been swapping sizes and tire types for as long as cars been on the roads. I was always putting bigger fatter tires on my GTO trying to get them to hook, all D.O.T. tires yet no one blinked an eye putting a different size tire on the car. Just did it last year to my truck. I will say they will not go smaller than OEM unless you sign a waiver. Bigger no hesitation! You don't believe that do you? Sure I do. Its a quote right off the Michelin replacement tire pages. You'll also find it at GY, Bridgestone, General, Maxxis or any other major tire builder. Because its not adheared to doesn't make it disappear. Here's how it works. The vehicle builder selects tires that are appropriate for that vehicle and sets a recommended cold inflation for them. Then they say not to use tires that are smaller or have less load capacity than the OE tires, UNLESS the replacements are approved by the vehicle manufacturer. A tire manufacturer is not going to knowingly trump the OE tire size without repercussions. Every time they have tried it and for some reason ended-up in court defending their decision, they have lost.
CALandLIN 02/11/20 07:48am Travel Trailers
RE: 5th wheel tires

This post was started by a person that has been a member of this forum for 20 years. I’m sure he knew what he was doing when he asked such a broad question (S). On the flip, what are the best LT or P tires? The China ST tire industry has substantially improved the quality of their product over the last few years. Some improvements were from advanced technology and others were just in keeping in step with consumer demands. Michelin and Bridgestone put some pressure on with their steel cased 16” tires and GY built the G614 steel cased LT and coined it RST. The GY was the only one to get substantial OEM support. I’m sure the cost of the others prevented the trailer manufacturers from using them as OEM. It could have also been the fact they are retreadable with tall treads making them damageable from high sheer forces all RV trailers encounter. Anyway, the China ST tire manufacturers took note and saturated the market with 16” steel cased ST tires. In the past year there have been at least two brands introduced with 15” steel cased ST tires. I’ve even seen a 12” ST radial. RIVA has mandated a recommended 10% load capacity reserve for all Original Equipment tires. That’s been in effect for nearly three years. The US government got in the act and demanded all imported ST tires must have speed ratings displayed on their sidewalls. TRA supports increases to 81 MPH. The average consumer seeking replacement tires have no real reason to cross over to something different than what has been recommended by the vehicle manufacturer. High mileage consumers usually have large trailers and the new steel cased ST tires will last just as long as other designs. Once you get into the 17.5” market the door opens wide for low platform trailer tires by numerous brand manufacturers. However, that market has lots of “J” speed rated tires @ 62 MPH
CALandLIN 02/11/20 04:11am Fifth-Wheels
RE: LT tires on your TT? Let the fight begin

"Tires should always be replaced with the same size designation, with approved or greater load carrying capacity -- or approved options -- as recommended by the vehicle manufacturer or authorized dealer." The preceding quote is a tire industry standard. It's the primary reason reputable tire dealers and tire installers will not deviate from a designated size if the have to fit the replacement to a vehicle. The proper nomenclature description for any tire is on its sidewall. Therefore, a ST235/85R16 is not compatible with a LT235/85R16. Those are both completely different tires. The prefix (LT, ST, P) are officially part of tire's size designation.
CALandLIN 02/11/20 03:23am Travel Trailers
RE: LT tires on your TT? Let the fight begin

The builders of ST tires advertise them as having stronger sidewalls than like sized LT or P tires. To counter that, one would have to get a tire engineer to unequivocally dispute that so called “theory”.
CALandLIN 02/10/20 07:38pm Travel Trailers
RE: LT tires on your TT? Let the fight begin

Next would be a Carlisle HD or Endurance. Both came out about the same time and so far both have no reported issues like their predecessor ( Marathon and Carlisle Radial Trail). You do know they started building an all steel tire? Click Here!
CALandLIN 02/10/20 12:37pm Travel Trailers
RE: LT tires on your TT? Let the fight begin

Hardly anyone learns from the ST - LT tire debates. You, as an owner can use any DOT certified highway tire.The problem is, you violate tire industry standards when not using tires designated for use as displayed on the vehicle certification label. Or other options as recommended by the vehicle manufacturer. Sure, Airstream as a trailer builder can use LT tires as Origional Equipment on their trailers. That is not a license for others to follow suit. Only the vehicle manufacturer has the authority for OE tire selection. Without their approval, designates OE tire sizes rule.Still at it Calvin. For those that don't know, this from Calvins past: This coming from a guy who had SEVEN oem tire failures. ( That should make anyone a disgruntled consumer) CALandLINs seven failures And from what you have also posted (staying with STs, and just increasing the LR) are still having troubles, though at a slower rate. Yea, keep right on drinking the kool aid and putting up with failures... At least you can take comfort in the fact that you are doing what you are supposed to do. I have no problem with Calvin's tire choices. I do think though, that continuing to try and scare people away from LT tire use..... Is despicable. You muddy the water by not accepting facts. It's what's basically wrong with the LT ST tire debates. Reading things into posts just damages the validity of the facts in the post. I never recommended anything. If you would do some objective tire researching you will find that all I said in the post in question was from established tire industry SOPs.
CALandLIN 02/10/20 08:56am Travel Trailers
RE: 5th wheel tires

"So according to YOU, and that inflation chart, I should be inflating those G rated tires at about 70 psi." YEP, Add 5 psi to the chart. No I am not the only person doing so. My Avion had GY "E" tires inflated to 80psi. Changed toy to GY "G" because there were no acceptable US Made "E" tires at that time so I went to the GY "G" tires and the chart said 80 so i ran them at 85psi. Ran this for several years and thousands of miles with perfect tread wear and NEVER hot. Charts are there for a reason. It just seems you are the only one promoting it, but if you say so. Read any replacement tire SOP and they all follow the industry standard that says; the replacement tires MUST, provide a load capacity equal to or greater than, what the OE tires provided at vehicle manufacturer recommended cold inflation pressures.
CALandLIN 02/10/20 04:54am Fifth-Wheels
RE: LT tires on your TT? Let the fight begin

Hardly anyone learns from the ST - LT tire debates. You, as an owner can use any DOT certified highway tire.The problem is, you violate tire industry standards when not using tires designated for use as displayed on the vehicle certification label. Or other options as recommended by the vehicle manufacturer. Sure, Airstream as a trailer builder can use LT tires as Origional Equipment on their trailers. That is not a license for others to follow suit. Only the vehicle manufacturer has the authority for OE tire selection. Without their approval, designates OE tire sizes rule.
CALandLIN 02/10/20 04:43am Travel Trailers
RE: Carlisle Radial Trail HD tires?

Are the Carlisle Radial Trail HD tires made in USA? Are these the Carlisle trailer tires that a lot of folks seem to like? The plant code "AQ" found on Carlisle ST tires identifies them as being made by Carlisle tire & wheel Co. LTD at Meixian, Guangdong, China.
CALandLIN 01/20/20 02:53pm Travel Trailers
RE: Goodyear Marathon tires class action?

While CALandLIN, aka FastEagle, says that his ST tire problems went away by switching to the “E” rated tires after the first 5, he is not telling the whole truth. The reality is that he went through over 22 tires by his own admission. A rather dubious track record for his beloved ST tires. Keith Hello Keith, still around quoting out of context as usual. How long has it been since you had an RV trailer? Lots of changes in ST tire quality in the past 10 years.
CALandLIN 01/16/20 08:30pm General RVing Issues
RE: Goodyear Marathon tires class action?

Man, does this thread bring back BAD memories. :S Kinda makes you wonder where the thread starter has been for LOTS of years - as well as whatever attorneys might be considering a clsas action!! Marathon horror stories (as well as some supporters) were all over the boards here. The bad karma of GY Marathon tires is really ancient history! Even when they were manufactured in the USA. The Airstream Owners forums had a Marathon Failures thread that ran for years - and probably still does. The plus side (if there is one) - GY would replace your Marathons (usually) at no charge AND pay for damage done to your trailer by a failed tire..:) Unfortunately, NO compensation for "down time"..:( BTW - GY lost a major lawsuit involving Marathons (and other GY tires) "way back when" (w/fatalities involved). Common practice to have the settlement "sealed", however the results of that one ran in a newspaper. OOPS!
CALandLIN 01/16/20 08:27pm General RVing Issues
RE: Goodyear Marathon tires class action?

Over the years the Goodyear Marathon RV trailer tires, both USA & China manufactured have taken a beating in the user market. Our 5th wheel trailer was one that suffered numerous failures before increasing tire load capacity solved our problems. Our (new) 2003 Keystone Everest 363K had 6000# vehicle certified GAWR axles. The factory installed original equipment (OE) tires were USA made ST235/80R16 LRD GY Marathons. Their maximum load capacity was 3000# at, 65 PSI which is what the placard recommended. Within 9 months we had used all five that came on the trailer because of various failure problems, all had lost their treads and a few blew out when the treads departed. A few trips to some scales showed that we had a single tire position overloaded but the axle was not overloaded. We were constantly traveling very close to maximum axle weights. The tires were provided nearly zero load capacity reserves and in some configurations, tires that were always overloaded. Top that off by traveling right at the 65 MPH maximum tire speed range you can see that the incident of early catastrophic failures was very predictable. By the middle of the second year of traveling we ditched all LRD tires and replaced them with LRE. Our failure rate almost completely disappeared. So, in my opinion, laying 100% of the blame on the GY tires was a misjudgment. It was common practice by nearly all RV trailer manufacturers to provide OE tires with minimum legal load capacities. I just happened to have a Keystone product. The rule has not changed, just the manufacturers application of it. Here is official minimum allowed tire load capacity per axle. (The sum of the maximum load ratings of the tires fitted to an axle shall not be less than the GAWR of the axle system as specified on the vehicle's certification label).
CALandLIN 01/13/20 10:56am General RVing Issues
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