replacing tires, have 3 6000lb axles

[Vanhollymorgan]

New road warrior and out of the gate i want to get rid of the powerking tow max. the 415 when loaded is around 17500, ive got 3 6000 lb axles on it. 235/80r16 tires. I was confused about tire weight ratings. My normal travel doesnt take me more than 300 miles from home. ( we use it for a travel sofball team 10u girls....74wins-6losses right now but gotta brag)

Any way, i dont have an extra 2400 for the good year g614 right now. (Nothing like a good kidney stone to mess with your budget the day you pour money into a 5th wheel) I do want to go with a LT tire. Would the duravis or sailun not have the right load capacity? I think there is a bridgestone commercial ta tire as well.

i'll probably do the 614's in time late next year. Whats the best alternative? Just doing a tpms and keeping the china bomb.? I generally stay 60mph.

i have about $1100 to spend now, maybe a little more if the wife is happy this week

What would the masses do? LOL

[fj12ryder]

Please post back when you've decided what you're going to do. Some of us get curious about things. 🙂

[flyinguy68]

Thanks FJ,
I'll let this horse die now 🙂

[fj12ryder]

That's about right, except you could go with the Sailun G-rated tires which some people (myself included) are trying.

Personally I see no sense in going to a 17.5" wheel/tire when you have wheels that will handle the higher pressure of a G-rated tire. The Sailun S637 G-rated tires weight capacity is 3,750 lbs. With triple axles you are good for 22,500 lbs., way over your GVWR and much, much higher than your actual trailer axle weight which I imagine is around 15,000 lbs. The Sailun can be had for less than $200 each.

This is what I have done and the Sailun's seem to be doing fine so far.

[flyinguy68]

gpshemi wrote:

flyinguy68 wrote:
So you are saying that the Goodyear G614RST (an ST tire that is very much raved about on these forums) is not a quality ST tire.

You seem annoyed, so bashing comment aside, I'm just trying to educate since you've asked. There is no quality ST tire like an XPS Rib or Duravis R250 (or G614).

The "raved" Goodyear G614RST is actually an LT tire with a speed rating of 75mph, not 65mph like ST tires, and follows the standard inflation tables.

http://www.goodyear.com/cfmx/web/truck/line.cfm?prodline=160007

It would be a great choice of tire if, your rims can handle the pressure, you can find a size, and you can choke the cost.

My money is still on the Duravis. It's obviously an easier choice for me since I'm at 18k, but I'll point out what most people don't when looking at tire loading. Even if you load to 21k, in my mind you should be able to subract the weight of the pin on the truck (3500ish?) for actual trailer axle loads...even if the manufactures don't allow you to do such for the coach numbers. That's putting you around 17,500 on your triple when loaded to the limit.

Your best bet though is to stop asking everyone else and go weigh you rig. Then you'll know for sure whats on each axle.


Good luck with your choice. The GY's are a great tire too.

Thanks for trying to help Hemi.
I think it is fair to say that I am frustrated. But I do appreciate the help. Please let me be clear. I have weighed my trailer(loaded). I don't have my cat scale ticket with me but I'm sure I was less than 17k(trailer) Probably 16.5k. Also Please note my MAX GVW on trailer is 18K, so I can't load to 21k. My problem seems to be that it has Dexter 7k axles(I don't know why). According to what I've been reading- tires must support the axle's rating of 7k. The RIBS & R250 don't do that. I do have wheels stamped at 110psi. So if I understand my research correctly I have 3 choices- 1.) stay with the dreaded ST's 2.) upgrade to 17" wheels, or 3.) go with G614 ?

[gpshemi]

flyinguy68 wrote:
So you are saying that the Goodyear G614RST (an ST tire that is very much raved about on these forums) is not a quality ST tire.

You seem annoyed, so bashing comment aside, I'm just trying to educate since you've asked. There is no quality ST tire like an XPS Rib or Duravis R250 (or G614).

The "raved" Goodyear G614RST is actually an LT tire with a speed rating of 75mph, not 65mph like ST tires, and follows the standard inflation tables.

http://www.goodyear.com/cfmx/web/truck/line.cfm?prodline=160007

It would be a great choice of tire if, your rims can handle the pressure, you can find a size, and you can choke the cost.

My money is still on the Duravis. It's obviously an easier choice for me since I'm at 18k, but I'll point out what most people don't when looking at tire loading. Even if you load to 21k, in my mind you should be able to subract the weight of the pin on the truck (3500ish?) for actual trailer axle loads...even if the manufactures don't allow you to do such for the coach numbers. That's putting you around 17,500 on your triple when loaded to the limit.

Your best bet though is to stop asking everyone else and go weigh you rig. Then you'll know for sure whats on each axle.


Good luck with your choice. The GY's are a great tire too.

[flyinguy68]

gpshemi wrote:
There is no quality ST tire. Not like a xps rib or a duravis r250 build. It's night and day.

So you are saying that the Goodyear G614RST (an ST tire that is very much raved about on these forums) is not a quality ST tire?

Look I'm just trying to learn about load ratings so that I can make proper choices about tire selection when it comes time to replace my tires. I'm already well aware of the China Bomb bashing, so spare me if that's all you have to add.

From what I can tell from the countless threads I have spent countless hours of reading is that I can not use Ribs or R250's as I have 7000lb axles x3 on a 18K gvw Trailer that has 16in wheels. Why this trailer needs axles for 21k instead of 18 I have no idea. Apparently it would have made things much easier if they were 6000 lb axles.

[gpshemi]

There is no quality ST tire. Not like a xps rib or a duravis r250 build. It's night and day.

[flyinguy68]

Lantley wrote:

flyinguy68 wrote:

fj12ryder wrote:

flyinguy68 wrote:

lincster wrote:

flyinguy68 wrote:

fj12ryder wrote:
Many wheels that come on 5th wheels with ST tires are rated to 80 psi., since that is the max pressure rating for E-rated ST tires. Some people want to change to a G-rated LT tire, for higher carrying capacity, which requires a higher pressure: 110 psi. for its maximum carrying capacity.

FJ,
Can you get LT's in a 16in wheel or does it have to go to 17in?

Thanks

Of course you can get LT's in a 16" wheel. That is what the majority of trucks came with for years.

I wondered because I read so many of these tire threads with folks saying to change to a 17in wheel

The main reason to go with a 17.5" wheel is that a tire in that size that has mucho carrying capacity is a shorter tire than the G-rated 16" tire. The G-rated 16" tires tend to be around 31.5" and I believe the 17.5" tires that will carry even more than the G-rated are around 30-30.5". Someone can correct me if I'm wrong, but that is the impression I've gotten.

Thanks for explaining that to me FJ. Not quite sure why one would need to increase their load carrying capacity over the stock tires, but to each their own. Thanks again.

One needs to increase their capacity because the OEM tires are inadequate if RV is loaded to its full GVWR capacity

I wasn't talking about OEM tires per se. I was inquiring about the decision to switch from a 16 inch wheel be it a quality ST or LT tire, to a 17 inch wheel. Yeah I've already figured out the OEM tires have a bad reputation. Thanks

[Lantley]

lincster wrote:
Weight rating isn't the only thing to consider.
Speed, tire pressure, ambient temps etc. All play a role.

True but if your rig is heavy it seems you will be more susceptible to tire failures.

[Ric_Flair]

photo of my tire failure

[lincster]

Weight rating isn't the only thing to consider.
Speed, tire pressure, ambient temps etc. All play a role.

[Lantley]

fj12ryder wrote:

Lantley wrote:
One needs to increase their capacity because the OEM tires are inadequate if RV is loaded to its full GVWR capacity

That's not entirely accurate. If the original ST tires were quality tires and would carry their rated capacity then a lot of time you would be just fine, especially if you're running 6,000 lb. axles. A 6,000 lb. axle with 2 3500-rated ST tires would be a decent combination, IF and that's a big IF, the tires were reliable, which they aren't.

In my case my triple axle toyhauler came with 6 E-rated ST tires, and a GVWR of 18,000 lbs. If the tires were good and would actually carry what they're rated for I would have been just fine.

But there are some out there that are borderline at best with their OEM tires/wheels.

Actually I think we are saying the same thing,the OEM tires are inadequate for the RV's they are installing them on. The closer one gets to the the max GVW of the trailer the likelihood of a blow out increases.
Yes the tires are poor quality and are not capable of meeting their max ratings.
Another seldom mentioned issue is the assumption all 4/6 tires carry the same equal weight. It's silly to think the weight of the RVis dispersed evenly across all 4 or 6 tires:S
In the end most OEM tires are marginal at best. I have not had very good luck on the 2 new RV;'s I have purchased. I am not the only one to encounter tire issues with fairly new tires. It is a very common issue that is only resolved by upgrading tires.

[BobWanderer]

gpshemi wrote:
...and a spare.
...or in my case two spares.

I carry 2 spares as well, but one is an ST tire. In the event I need to use it, it will be for a very short time to get the LT tire replaced.

[BobWanderer]

Something to think about with the O E tires.
More than likely it has been towed before you bought it.
From the factory to the dealer.
From the dealer to an R V show and back.
I doubt anyone checked the tire pressures before doing this, the tires can be damaged before you take possession of it.

One trailer we have looked at has been towed to at least 2 different R V shows here in SoCal, and most likely from the factory in Riverside to the dealer in Colton. If I end up buying this unit, I will demand new tires before taking delivery, but I will bet they just swap the tires with another rig. I already told D W were replacing the tires before any trips so put that in our budget before we buy anything.