Replacing tires

[jasin1]

I picked up a nail in my tire a few weeks ago on my way to Delaware, was originally planning on buying exact replacement “trailer king “as my tires are only a couple months old.
Now I think I’m going to put that $100 towards a new set instead of investing in the old.
I’m going to go with the Goodyear endurance. What is the best way to do that?
Should I use two jacks on one side so I lift both axles together? And then can I block all four axle points at spring perches with blocks? I don’t want to drive my trailer to the tire shop because it’s going to be tight

[QCMan]

Good choice of tires but bad choice of tire shop. You will not be buying tires very often so pick a tire store that works on trucks also and they will have room and the expertise to jack your unit properly. Have them install either steel or brass valve stems instead of rubber so that when you get a tire pressure monitoring system all you will have to do is screw on the sensors.

[jasin1]

Originally Posted by QCMan

Good choice of tires but bad choice of tire shop. You will not be buying tires very often so pick a tire store that works on trucks also and they will have room and the expertise to jack your unit properly. Have them install either steel or brass valve stems instead of rubber so that when you get a tire pressure monitoring system all you will have to do is screw on the sensors.

Yeah that’s a good point. And yes I have the eeze tpms system and metal stems. It is what alerted me to the nail in the tire.

[flybouy]

You might want to give these guys a call. They work on everything from riding mowers to semis. Easy access to the shop as well. https://www.benstiresales.com/

[CWtheMan]

Originally Posted by bjasin1

I picked up a nail in my tire a few weeks ago on my way to Delaware, was originally planning on buying exact replacement “trailer king “as my tires are only a couple months old.
Now I think I’m going to put that $100 towards a new set instead of investing in the old.
I’m going to go with the Goodyear endurance. What is the best way to do that?
Should I use two jacks on one side so I lift both axles together? And then can I block all four axle points at spring perches with blocks? I don’t want to drive my trailer to the tire shop because it’s going to be tight

When you go from the Trailer King ST235/80R16 LRE to the GY Endurance of the same designated size and load range, you're giving-up 100# of load capacity per tire.

Most miss that fact and end up using replacement tires that are not qualified as replacements for the TK tires according to tire industry standards.

[jasin1]

Originally Posted by CWtheMan

When you go from the Trailer King ST235/80R16 LRE to the GY Endurance of the same designated size and load range, you're giving-up 100# of load capacity per tire.

Most miss that fact and end up using replacement tires that are not unqualified as replacements for the TK tires according to tire industry standards.

Well I don’t want to do that. I will look at Carlisle and see what they have

[jasin1]

Originally Posted by flybouy

You might want to give these guys a call. They work on everything from riding mowers to semis. Easy access to the shop as well. https://www.benstiresales.com/

Will do. Thanks!

[foldbak]

So what is the best trailer tire to buy? I just discovered one of my 2018 china bomb's is flat. A good time to upgrade.

[mikec557]

Originally Posted by CWtheMan

When you go from the Trailer King ST235/80R16 LRE to the GY Endurance of the same designated size and load range, you're giving-up 100# of load capacity per tire.

Most miss that fact and end up using replacement tires that are not qualified as replacements for the TK tires according to tire industry standards.

Maybe I misunderstood what is said above, but if not, then I have to add my 2-cents.

I did this replacement on my last three RVs. In each case I was inside the tire shop with the techs. I can assure you that EACH Goodyear tire is NOT 100lbs heavier. All 4 tires together might weigh 80-100 lbs more than the entire China bomb set. But there's no way the Goodyear set weighs 400lbs "more" than the China set.

[JRTJH]

Originally Posted by mikec557

Maybe I misunderstood what is said above, but if not, then I have to add my 2-cents.

I did this replacement on my last three RVs. In each case I was inside the tire shop with the techs. I can assure you that EACH Goodyear tire is NOT 100lbs heavier. All 4 tires together might weigh 80-100 lbs more than the entire China bomb set. But there's no way the Goodyear set weighs 400lbs "more" than the China set.

Tire weight is not what was being addressed. The GY Endurance 235 80R16 LRE maximum load at 80 PSI is 3420 pounds. The Trailer King 235 80R19 LRE maximum load at 80 PSI is 3520 pounds. In other words, the maximum load is 100 pounds less with the GY tires.

In essence, "you're giving up 100 pounds of load capacity per tire with the GY tires".....

[mikec557]

Originally Posted by JRTJH

Tire weight is not what was being addressed. The GY Endurance 235 80R16 LRE maximum load at 80 PSI is 3420 pounds. The Trailer King 235 80R19 LRE maximum load at 80 PSI is 3520 pounds. In other words, the maximum load is 100 pounds less with the GY tires.

In essence, "you're giving up 100 pounds of load capacity per tire with the GY tires".....

Ahhh. I stand corrected. Thanks for clearing that up for me.

[nied]

Why is the load reduction an issue? The 315 is only 9300 lbs on the axles fully loaded, the remainder on the pin.

[rhagfo]

Originally Posted by CWtheMan

When you go from the Trailer King ST235/80R16 LRE to the GY Endurance of the same designated size and load range, you're giving-up 100# of load capacity per tire.

Most miss that fact and end up using replacement tires that are not qualified as replacements for the TK tires according to tire industry standards.

Originally Posted by JRTJH

Tire weight is not what was being addressed. The GY Endurance 235 80R16 LRE maximum load at 80 PSI is 3420 pounds. The Trailer King 235 80R19 LRE maximum load at 80 PSI is 3520 pounds. In other words, the maximum load is 100 pounds less with the GY tires.

In essence, "you're giving up 100 pounds of load capacity per tire with the GY tires".....

Well I would happily give up almost 500# per tire and put a set of Lite truck tires LT 235/85-16E’s 3,042# per tire, for a real tire I could trust to carry its full rating.
The 12,168# total rating is almost the full 5ers GVWR of 12,390#.
I run LT tires on our 32’ 12,360# GVWR and are very happy with their performance.
I have always taken my trailer to the tire shop, and let them do all the work.

[CWtheMan]

Originally Posted by rhagfo

Well I would happily give up almost 500# per tire and put a set of Lite truck tires LT 235/85-16E’s 3,042# per tire, for a real tire I could trust to carry its full rating.
The 12,168# total rating is almost the full 5ers GVWR of 12,390#.
I run LT tires on our 32’ 12,360# GVWR and are very happy with their performance.
I have always taken my trailer to the tire shop, and let them do all the work.

The industry wide standard for replacement tires is very clear. They must provide a load capacity equal to or greater than what the original equipment tires provided.

[rhagfo]

Originally Posted by CWtheMan

When you go from the Trailer King ST235/80R16 LRE to the GY Endurance of the same designated size and load range, you're giving-up 100# of load capacity per tire.

Most miss that fact and end up using replacement tires that are not qualified as replacements for the TK tires according to tire industry standards.

Originally Posted by rhagfo

Well I would happily give up almost 500# per tire and put a set of Lite truck tires LT 235/85-16E’s 3,042# per tire, for a real tire I could trust to carry its full rating.
The 12,168# total rating is almost the full 5ers GVWR of 12,390#.
I run LT tires on our 32’ 12,360# GVWR and are very happy with their performance.
I have always taken my trailer to the tire shop, and let them do all the work.

Well industry standard or not I would rather have GY Endurance than Trailer King tires IF I were putting on ST tires.
To me it sounds like TK is playing games with their load rating, so to force using their tires as replacements.

I have a 2005 32' 12,360# GVWR 5er that came from the factory with LT235/85-16E tires rated at 3,042# ea.. This is more than enough for the 10,000# +/- carried on the 5er axles.
ST tires claim high load ratings, and low speed ratings, while LT tires claim high speed ratings and lower load ratings. What is the speed rating on the TK and GY endurance, I believe the GY endurance is 81 mph, is the TK still 65 mph?

The OP's 5er has a GVWR of 12,390#, the OEM TK tires have a load rating 3,520# ea. or a total of 14,080#, almost half again of what they are carrying, yet we here stories of blow outs all the time.
We very seldom hear anyone tell of blowouts on their LT truck tires, these tires run over the same roads and pot holes as the ST's on the trailer behind them, yet the ST's have blowouts, and the LT's just keep going.

[Ribtip]

Originally Posted by foldbak

So what is the best trailer tire to buy? I just discovered one of my 2018 china bomb's is flat. A good time to upgrade.

I went with the carlisle hd. Been a good tire so far.

[JRTJH]

Originally Posted by rhagfo

Well industry standard or not I would rather have GY Endurance than Trailer King tires IF I were putting on ST tires.
To me it sounds like TK is playing games with their load rating, so to force using their tires as replacements.

I have a 2005 32' 12,360# GVWR 5er that came from the factory with LT235/85-16E tires rated at 3,042# ea.. This is more than enough for the 10,000# +/- carried on the 5er axles.
ST tires claim high load ratings, and low speed ratings, while LT tires claim high speed ratings and lower load ratings. What is the speed rating on the TK and GY endurance, I believe the GY endurance is 81 mph, is the TK still 65 mph?

The OP's 5er has a GVWR of 12,390#, the OEM TK tires have a load rating 3,520# ea. or a total of 14,080#, almost half again of what they are carrying, yet we here stories of blow outs all the time.
We very seldom hear anyone tell of blowouts on their LT truck tires, these tires run over the same roads and pot holes as the ST's on the trailer behind them, yet the ST's have blowouts, and the LT's just keep going.

Russ,

I "think" (won't take the time to do the research to prove it) that LT tires are manufactured with a 20% reserve capacity and ST tires are manufactured with 0% reserve capacity.

If that's true, then your LT tires with a rating of 3042, actually have 20% more capacity (608.4 in 20% reserve) for an "actual rating of 3650.4 pounds.

Additionally, during the time that your trailer was constructed, Keystone "elected to fit LT tires" on your model. I'd ask you, did they use LT tires with the knowledge that there is a 20% reserve capacity and calculate that into "carried weight" or did they fit the tires with the 20% "reserve that's not used" ???

In other words, did the engineers at Keystone calculate your tires at 3042 pounds or did they calculate them at 3650 pounds ???? Not that it makes a difference at this point, but you may be talking "apples and oranges" or looking at LT tires as replacements, you may be talking "apples and apples" or maybe "apples and squash".... The question becomes: "What will a safety expert witness say about the tires if it ever becomes a "he said/she said" in a court of law" ??????

Using what's on the factory tire label as replacements is the "safe in court" route for replacements, using "a forum recommendations"... Well, not so much if the "gritty hits the fan".....

[CWtheMan]

Originally Posted by rhagfo

Well industry standard or not I would rather have GY Endurance than Trailer King tires IF I were putting on ST tires.
To me it sounds like TK is playing games with their load rating, so to force using their tires as replacements.

Actually GY & Maxxis are the only popular brands that build the ST235/80R16 LRE With a maximum load capacity 0f 3420# @ 80 PSI. Almost all of the tires of that size and load range from China manufacturer's have 3520# of load capacity.

There is an explanation behind the differences. It has to do with 7000# axles. In the beginning, Keystone like other RV trailer builders, stuck pretty close to minimum standards. (Thus the abundance of early tire failures). Because they would not be in violation of the FMVSS (standards) the builders could use 3500# tires on 7000# certified axles. At that time the ST235/80R16 was only manufactured with a LRD, 3000# of load capacity. The end result was there were three distinct maximum load capacities manufactured for the LRE ST235/80R16, 3420#, 3500# and 3520#. To get those 3420# tires on 7000# axles the trailer builder had to de-rate their certification to something below 6840#. In the reference picture you can see how manufacturers de-rated 7000# axles to accommodate the 3420# tires. IMO, Keystone like others had a firm, long standing OEM agreement with the GY Marathons and until they could start using the TowMax brand, they were stuck with axle de-grading. It didn't take long for GY to see the light and they started Building the - what I call bastardized - all steel G614 for 7000# axles. Not long after that Sailun jumped into that market with a like Designated size to compete with the GY G614. We all know where that went. Sailun started building the all steel 16" ST tires for 7000-8000# axles and it didn't take long for all the other China ST manufacturers to "jump onboard".



If you're going to go back in RV trailer tire history you're going to have to do a lot of researching. Most RV trailer tire history isn't archived. I've been doing it for about 18 years and have a huge data base full of failures and suspected causes. Being a Keystone RV trailer user I have more information from them than most others. Back in 2005/2006 Keystone, having numerous ST tire failures reported on the ST235/80R16 LRD they decided to experiment with the standard built light truck tires. They found after those two years that their favorite brand (Uniroyal LT235/85R16 LRE) was suffering a similar failure ratio as the previous ST235/80R16 LRD. When the higher load capacity LRE ST came on the market, they switched back.

Today with the RVIA mandated 10% load capacity reserves above GAWR in effect, things are changing. Failure rates are dropping. The China ST tire manufacturers have more than 15 years experience with them and our market, which makes them much more receptive to our needs and new designated sizes and internal constructions are much improved.

[sandy43]

Goodyear Unisteel G614 RST Radial Tire 14ply. USA made.

[jasin1]

Originally Posted by CWtheMan

The industry wide standard for replacement tires is very clear. They must provide a load capacity equal to or greater than what the original equipment tires provided.

If no clearance issues exist, could I go with a 235/85/16 instead of 235/80/16 in Goodyear endurance? That gives me over 3600 lbs per tire at same width and just a 1 inch difference in height. My rig would still be under 13’6”