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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
If coming out of this I end up needing new wheels and tires my options are not many. So far I have the ST E range that Capri Racer suggested and that is about it. I have not found any LT tire that fits the diameter and at least a 2,500# max load rating. If some one knows of a 28.3" OD tire with that load rating in a LT please point it out.
John
Take a look at the very last item in this reference. Can you make a 29.3" tire work?
Maxxis LT
FastEagle
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FastEagle
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04/25/12 07:58pm |
Tech Issues
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RE: Tires ..... I know ... I know .. lol
The 2011 Springdale 291 - East or West coast - designs are almost identical in size and weight and the stock tires should be ST225/75R15D. Your GAWR for that trailer is 8700#/8800# depending on coastal design. So at full load you will still have a nice total tire reserve load capacity of 1360# at 65 psi. If you have taken good care of those tires there is no reason they should not make the trip to Texas. Keep them aired, check them at every stop for excessive heat and drive 65 MPH or less. Have a safe and fun trip.
FastEagle
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FastEagle
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04/25/12 07:37pm |
Travel Trailers
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RE: Tire Inflation
I have the same XTA 17.5 inch, load range J trailer Michelin tires on our 5th wheel. I did a lot of research on this before I switched from the 16" tires and wheels. I spoke with a Michelin "rep" and he said what I had always believed --- run the maximum pressure as stated on the sidewall. In this case it is 125 psi. These tires wear and ride very well. Good luck with you new ride.
Bigdon68
Do you know? That particular Michelin tire has a 62 MPH speed rating and according to Michelin's tire maintenance manual, it cannot be manipulated for any increased speed.
FastEagle
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FastEagle
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04/25/12 03:42pm |
Fifth-Wheels
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
Sometimes these things get just too deep into mechanics and the simple answer is overlooked. Ask the vehicle manufacturer for approval. If they recommend using a smaller tire or one with less load capacity, get it in writing and find the tires.
FastEagle
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FastEagle
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04/24/12 06:17pm |
Tech Issues
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RE: Tire Inflation
I get a lot of heat in these tire threads when I comment on this subject. So I’m just going to post this reference. I suggest you download the Complete Care and Service Manual and then read all chapters. Chapter four will refer to the first three chapters rather than repeat something.
Like the Tire and Rim Association (TRA) the Rubber Manufacturers Association is a major contributor to the development of the industries rules, regulations and standards.
It’s important to make a mental note on RV type as the RV trailer’s tires are selected according to the vehicle’s certified GAWR, whereas Motorhome tires are selected according the vehicle’s GVWR.
In chapter four you will see that the RMA does not recommend replacing ST tires with anything other than some more ST tires.
When using tire manufacturer’s load inflation charts to set tire pressures according to the highest weight on an axle end it is never recommended to use less than the recommended ((correct) tire pressure (s) found on the certification label/tire placard or in the vehicle’s owner’s manual.
It’s all in there if you will take the time to read it.
RMA Ref
FastEagle
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FastEagle
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04/24/12 05:51pm |
Fifth-Wheels
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RE: What tire pressure would you run ?
OK! Tire police entering the room…That’s what I’ll be called for this industry and regulation supported post.
The correct tire pressure for all RV trailers is the recommended tire pressure found on the vehicle’s certification label/tire placard. It is the only one accepted by the industry and is mandated by the DOT to also be in every trailer’s owner’s manual.
The industry will never use less tire pressure than that recommended by the vehicle manufacturer. Most ST tire manufacturers will not even print a load inflation chart for their tires because they do not want the tire pressures manipulated. Under inflation and overloading is the number one cause for RV trailer tire failures. They work hand and glove with each other.
Tire pressures are derived from two completely different methods for recreational vehicle’s. For self propelled RVs (class A-B-C) the GVWR is used to select tires. For RV trailers the GAWR is used. So, when reading about RV tire maintenance it would be advisable to read your owner’s manual.
The OP had 32 psi tire pressures. A hypothetical incident using LRC ST tires requiring 50 psi would have those tires well below the 80% tire pressure required to prevent being “run flat”. I would consider them damaged and unsafe. When replacing them I would consult with the vehicle manufacturer and set a new recommended tire pressure for the replacement tires. Maxxis and sometimes GY are the only manufacturers of ST tires that I know for sure will allow their tires to be manipulated for load requirements and then only by the vehicle manufacturer.
FastEagle
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FastEagle
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04/23/12 09:10pm |
Travel Trailers
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RE: What tire pressure would you run ?
According to all the reference material you will find on the internet such as RMA or NHTSA, any tire being operated at 80% - or lower - than the recommended (cold) tire pressure is considered to be in a “run flat” condition and should be inspected by your tire dealer.
FastEagle
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FastEagle
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04/22/12 02:58pm |
Travel Trailers
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
A question for our experts:
There have been numerous failures from day one with the ground-up LT235/85R16G tires designed for trailer service. They are almost exclusively used on 7000# axles and should have the load capacity to live out their expected life expectancy but are falling short of it. The leading manufacturer has made at least one major attempt at resolving the problem with limited success.
What do you guys think about that steel cased tire? I’ve wondered about it’s regrooveability feature. Even though it has shallow threads it still has the extra tread depth to allow regrooving. Is that presenting a heat problem when the tire is near it’s operational limits? Do you think regrooving them early would help in extending their life expectancy?
FastEagle
I covered Retread and Regroove in my blog.
The heat comes from the area at the edge of the steel belts so cutting parts of the tread will not reduce the amount of rubber between the tread surface and the belts. Also regroving will leave microscopic cuts in the base of the cuts which could lead to accelerated cut growth.
I can't see that you answered anything I asked.
FE
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FastEagle
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04/22/12 02:18am |
Tech Issues
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RE: Karrier trailer tires
What is your Florida location?
There is a large farmers/flea market at Waldo, FL (US-301). One of the concessions there sells every size of Maxxis LT and ST tires and they mount them.
FastEagle
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FastEagle
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04/21/12 08:33pm |
Towing
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
About Defects and Recalls.
L@@K Here
FastEagle
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FastEagle
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04/21/12 03:39pm |
Tech Issues
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
A question for our experts:
There have been numerous failures from day one with the ground-up LT235/85R16G tires designed for trailer service. They are almost exclusively used on 7000# axles and should have the load capacity to live out their expected life expectancy but are falling short of it. The leading manufacturer has made at least one major attempt at resolving the problem with limited success.
What do you guys think about that steel cased tire? I’ve wondered about it’s regrooveability feature. Even though it has shallow threads it still has the extra tread depth to allow regrooving. Is that presenting a heat problem when the tire is near it’s operational limits? Do you think regrooving them early would help in extending their life expectancy?
FastEagle
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FastEagle
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04/21/12 01:15pm |
Tech Issues
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RE: Tire size - will my rims work?
Question is...will the original rims fit the ST225/75R15?
Thanks
Any dealer that sells the tire must provide a listing of the required rim sizes. Just drop by and check out the rim sizes for both tire sizes.
FastEagle
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FastEagle
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04/19/12 11:50pm |
Travel Trailers
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
As this thread winds down I want to insert a little food for thought.
I belong to just about every internet forum that has active tire threads. I don’t use the same name on all of them for the obvious reasons. I don’t attract much warm sentiment. Most posters are already angry about tire failures and have a mindset, difficult, at times, to penetrate.
Having worked as an aircraft mechanic for more than 40 years I’m a pretty good study of mechanical things and try to turn over all the stones before coming to any conclusions.
Of the thousands of posts I’ve read over the past 5+ years I can confidently say less than 10% of those posters took the time to investigate the cause of their tire (s) failure (s). Because the vast majority of RV trailers have ST tires as OE they get the brunt of the criticism.
In the early to mid 2000s some of the mass producers of RV trailers used various LT tires. Their failures were very similar to those suffered by their cousins the ST tires. As the toy haulers have grown in popularity so has their size. Many now have triple axles and top out at somewhere over 18K GVWR. So have the spacious 5th wheels with some now using axles with 8000# GAWR.
In pops the 16” LRG LT tire that is really a ST tire in disguise with a 75 MPH speed rating. A strange thing has happened with this tire and it’s primary manufacturer. Whenever a failure is reported to them they pick-up all the costs and the failed tires. The consumer get’s no feed back but the bucks make them happy.
Early on in our venture into full time RVing we did over 100,000 miles and 43 states and a couple of CDN provinces in less than five years. We used a lot of tires and had just about every kind of tire failure, catastrophic or otherwise. None of them were ever determined to be caused by material failure or rim failure. They were all ST tires and we still use them - not the same brand. We are now 520# per tire above what our OE tires were rated. Since 2008 we have had two failures. One was completely destroyed. The steel valve stem was missing. The other sustained a cut sidewall in a construction area on the city streets of Rochester, NY.
So, the bottom line. Is the China Bomb Syndrome Valid? There have been zero recalls for ST tires.
People will say they have always done everything right and still had numerous failures. My question to them is, were they OE tires? None of us know the history of OE tires and just how much abuse they sustained before we took better care of them.
FastEagle
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FastEagle
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04/19/12 03:50pm |
Tech Issues
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RE: Best TT tires?
And the regulatory body that facilitates all of this by classifying them as a non passenger carrying tire even though they are used on the same highways endangering the traveling public…
Is there any wonder that there are unresolved problems and inaccurate information available about the problems…
Actually all tires certified by the DOT for highway service can carry passengers. Here is a handy reference. It's by state and lists almost all the restrictions that are placed on RV trailers.
Towing Laws by state.
FastEagle
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FastEagle
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04/19/12 02:44pm |
Travel Trailers
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RE: air pressure in tires
Talking about the rims ,,where are they marked at to tell me what pressure??
The good news is they will be marked. Most will be marked on the front or back side. The bad news is some are only marked on the inside. The rim manufacturer will know.
FastEagle
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FastEagle
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04/18/12 02:31pm |
Travel Trailers
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RE: air pressure in tires
When using replacement tires with increased load capacity the only way to take advantage of extra load capacity is with air pressure. Depending on the design and brand of tire it’s always advisable to consult with the vehicle manufacturer for their recommendation on tire pressure for the replacements.
Most brand manufacturers of ST tires will always require full sidewall pressure even for upgrades such as yours, so you should ask the tire manufacturer what their requirement is. Most often even though a retailer may carry and install ST tires they are not familiar with each brands requirements. The only one I know for sure that allows manipulation of air pressure for weight is Maxxis. GY is wishy washy about it with nothing concrete to go by other than ride quality and I personally think that’s a carry-over from self propelled RV tires.
Another thing retailers often - conveniently - overlook is the rim's capacity to accept the upgraded tire. The rim must be equal to or greater than the load capacity and psi rating of the installed tire.
FastEagle
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FastEagle
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04/18/12 01:36pm |
Travel Trailers
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
Copied from Goodyear bulletin PSB #2011-13 dated May 18, 2011
Many trailer manufactures establish the recommended tire inflation pressure based on the 65 mph (104 km/h) rated speed for ST tires. In these cases, the ST tires should be inflated 10 psi (69 kPa) higher than the trailer placard for speeds up to 75 mph (121 km/h) (wheel must be rated for this higher inflation pressure). If the trailer manufacturer’s placard specifically states that the cold inflation pressure is suitable for speeds above 65 mph (104 km/h), no additional inflation pressure adjustment is required.
But then again, there is the issue of exceeding the max inflation pressure listed on the sidewall of the tire. Most of the time the trailer manufacturer already has you inflating to the maximum pressure anyway -- so this is a help to virtually no one.
Just an FYI: In the world of tires, there are exceptions to the rules, and this is one of them. Besides, if you look at the sidewall of an ST tire, it will say "Max Load XXXX at YY psi". That is NOT a statement for a maximum pressure, but it is a statement for maximum load.
In the world of government regulations "recommended tire pressure" is the "correct" tire pressure. Therefore, the tire placard/certification label depicts the correct tire pressure. So, the vehicle manufacturer cannot be held accountable for any GY tire failures when the tire pressure has been increased for speed. Maybe that's why GY is so prompt in paying for vehicle damages. And, remember, Carlisle only recommends 60 MPH for their radial ST tires. Would it be wise to go beyond that when Carlisle will not warrantee them once it’s determined excess speed contributed to a failed Carlisle tire?
Bottom line...Those of us that do not have access to industry standards should leave such things to the vehicle manufacturers to sort out and depict on the vehicles and in their individual vehicle owner's manuals. After all, They built it.
FastEagle
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FastEagle
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04/18/12 11:07am |
Tech Issues
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RE: New Hampshire
I was born and raised in that neck of the woods. I have an aunt living in Dover, NH and an uncle living in Rochester, NH and numerous cousins in those areas. In fact one of my first cousins owns and operates a campground up in West Ossipee, NH called Whit’s End and we stay up there when we are just chilling out and visiting with family.
Here is their web site and a pictures of our rig during our last stop there.
web site
CG Pix
When we want to be a little closer to the main stream tourist areas yet not right in them we stay at a nice little family run CG in Berwick, ME. It’s just a short drive to Dover or Rochester, NH or the outlet malls in Kittery, ME with a straight shot to Wells Beach and great sea food.
Here is their web site and a couple of pictures.
web site
CG Pix
Wells Beach
FastEagle
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FastEagle
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04/16/12 10:28pm |
RV Parks, National Parks, State Campgrounds & More
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RE: Revived Trailer Tire Thread (formerly on the 5th Wheel Forum
According to the specs I found for your trailer you have 7000# axles. Because Keystone has used OE tires rated at 3520# @ 80 psi (A very poor selection for a toy hauler - In my opinion) you have a wide selection of suitable replacement tires to choose from and it looks like you have been doing a lot of good homework.
As you can see in this reference there are a lot of options just in the 16” LRG. There are equally as many 17.5” choices, many with very reasonable prices for tire/rim combinations.
The bottom line I’m getting to is your recommended tire pressure for whatever upgrade you decide to use. Remember, your manufacturer has set your minimum tire load capacity at 3520# with the OE tires. None of the 16” LRG tires will provide that much load capacity at 80 psi. And the 17.5” tires will also need more than 80 psi. It’s been recommended numerous times in this thread to use at least 15% in load capacity reserves above the vehicles GAWR (7000# ea).
2010 specs
FastEagle
Actually the tires that Keystone used for my rig are Carlisle's rated at 3420lb and therefore adjusted the placard numbers for GAWR to 6840lbs. I determined they were 7k axles through some homework and in order to achieve 15% reserve capacity I need a tire rated to at least 4120lbs, so I have decided to go with the 17.5" option with a load rating of 4805lbs... Lots of reserve capacity!
You know, Keystone isn’t the only ones doing that. I’ve been to a number of RV showings this spring and took a lot of pictures. The one below is similar to what is going on with a lot of manufacturers and their tire selection for the 7000# axles. They are lowering their true value on the certification label - perfectly legal - so they can put on very marginal tires. In the end they had to reduce the cargo capacity to do it.
specs photo
FastEagle
p.s. Very good final selection for your upgrade. Toy haulers really need some nice reserves. It would be counterproductive to have all that room and not use it.
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FastEagle
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04/16/12 09:17pm |
Tech Issues
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RE: LT Tires
I put cheap generic rebranded LT265/75R16s LREs on our 2011 Chaparral 355. They have a load rating of 3420 lbs, just like any other LT265/75.
The trailer weighs about 13K. I pulled it a bunch last summer with zero problems. I am very happy I did so.
I hope you have the right rims. The minimum rim width for those tires is 7".
FE
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FastEagle
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04/15/12 08:34pm |
Fifth-Wheels
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