HELP camper blowout problems!!!!!

[dustin3532]

hello

I have a 06 cardinal 33le with alco #6000 pound axles(6 lug hubs) with a gvwr of 13990.

Done had about 10 tires failures since new!!!
I've had enough...lol
Tag says it should have lt235/85r16/e, but when I bought it it had st235/80r/e and never noticed what it had on tag till now!!!!

Do I need to upgrade the drum hubs to 8 lug and 17.5 rims with Goodyear G114 21575R17.5???

Or just stay with the 16in rims and go with the goodyear lt235/85/r16 g614 rst??? (current 16 in rims are only rated for 80 psi)

Im gonna try and go weigh the rig this week to give me a better idea of where I stand as far as the weight goes, but im almost sure that its an overweight problem causing my failures!!

We really love the rv and don't want to get rid of it!!!!
That's the only reason its not sitting at a dealer lot right now..lol

any input would help

thanks in advance,
Dustin

[NC_Hauler]

dustin3532 wrote:
just purchased 5 new bridgestone duravis r250
LT235/85 r16 from walmart

Thanks everyone for the info!!!!!!!

You did well grasshopper:B

[dustin3532]

just purchased 5 new bridgestone duravis r250
LT235/85 r16 from walmart

Thanks everyone for the info!!!!!!!

[dustin3532]

Me Again wrote:

dustin3532 wrote:
Went and weighed it today!!!!

Steer axle 5040
Drive axle 6080
Trailer axles 10800
Gross 21920

That's with a full tank of water but minus our clothes and food

Great, go price Bridgestone Duravis R250's LT235/85R16E's or LT245/75R16E's and become a happy camper! You will not be sorry with the choice!

Chris

thanks......looking at those or the michalin ribs!!!!

[dustin3532]

jadatis wrote:
Gathered the information all over the topic, and made a picture of my calculator with your curent ST tires and GVWR of 13990 lbs.
Then only 10 % towbar weight or whatever the tonge is resting on.
Because you always have to go from the worst case scenario.
The weights of 10800 lbs you gave can be for instance devided LF 2950 LR 2450 RF 2500 and RR 2900 , so crossed weight differences between the axles.
Then you would think that is way below the maximumload.
But to my conclusion in the topic I already gave link to, you have to substract even 6 LI steps from the ST maximum load to give the tire a yust as save deflection then a LT tire with speedcode Q = up to 160km/99m/h. then only about 2850 lbs maximum load.
The LT tires with 85R16 only slightly more maximum load of 3020 but probably for 140km/86m/h so also for 99m about the same maximum load.

But to law these LT's are not allowed because they have to carry with the 4 of them the GAWR wich is probably 13990-10%= 12598 so more then 4 times 3020= 12080 .
And thats the strange thing here, that tough to laws of nature the LT's can carry yust as much load savely and with long lasting tires, they are not allowed to law.

Someone wrote also 18% pinweight and that is not allowed by law in america as far as I learned, 15% is maximum allowed.

Here the picture with the ST tires maximum load left as its given and then even warning of poor reserve to my standards, and an advice of 83 psi , so a bit above AT-pressure, and a reduction to 65m/h , but that is going from N speedrated 140km/86m/h so this even lower advice speed.
I did not use your low weighed loads , are they for fully filled 5th-wheeler? If you would reduce the maxload witht the system of mine, advice-pressure would go sky high. and only low speed advice.
So a at least F-load tire in same sises LT would be advicable.
But then you have to mind if the rimms are allowed that higher pressure .

what in the world does all that mean???????.......lol

[Me_Again]

dustin3532 wrote:
Went and weighed it today!!!!

Steer axle 5040
Drive axle 6080
Trailer axles 10800
Gross 21920

That's with a full tank of water but minus our clothes and food

Great, go price Bridgestone Duravis R250's LT235/85R16E's or LT245/75R16E's and become a happy camper! You will not be sorry with the choice!

Chris

[Me_Again]

jadatis wrote:
Gathered the information all over the topic, and made a picture of my calculator with your curent ST tires and GVWR of 13990 lbs.
Then only 10 % towbar weight or whatever the tonge is resting on.
Because you always have to go from the worst case scenario.
The weights of 10800 lbs you gave can be for instance devided LF 2950 LR 2450 RF 2500 and RR 2900 , so crossed weight differences between the axles.
Then you would think that is way below the maximumload.
But to my conclusion in the topic I already gave link to, you have to substract even 6 LI steps from the ST maximum load to give the tire a yust as save deflection then a LT tire with speedcode Q = up to 160km/99m/h. then only about 2850 lbs maximum load.
The LT tires with 85R16 only slightly more maximum load of 3020 but probably for 140km/86m/h so also for 99m about the same maximum load.

But to law these LT's are not allowed because they have to carry with the 4 of them the GAWR wich is probably 13990-10%= 12598 so more then 4 times 3020= 12080 .
And thats the strange thing here, that tough to laws of nature the LT's can carry yust as much load savely and with long lasting tires, they are not allowed to law.

Someone wrote also 18% pinweight and that is not allowed by law in america as far as I learned, 15% is maximum allowed.

Here the picture with the ST tires maximum load left as its given and then even warning of poor reserve to my standards, and an advice of 83 psi , so a bit above AT-pressure, and a reduction to 65m/h , but that is going from N speedrated 140km/86m/h so this even lower advice speed.
I did not use your low weighed loads , are they for fully filled 5th-wheeler? If you would reduce the maxload witht the system of mine, advice-pressure would go sky high. and only low speed advice.
So a at least F-load tire in same sises LT would be advicable.
But then you have to mind if the rimms are allowed that higher pressure .

Could you please stop posting your confusing gibberish about tires! It does not appear to add any values to use of tires in North America!

Thanks Chris

[jadatis]

Gathered the information all over the topic, and made a picture of my calculator with your curent ST tires and GVWR of 13990 lbs.
Then only 10 % towbar weight or whatever the tonge is resting on.
Because you always have to go from the worst case scenario.
The weights of 10800 lbs you gave can be for instance devided LF 2950 LR 2450 RF 2500 and RR 2900 , so crossed weight differences between the axles.
Then you would think that is way below the maximumload.
But to my conclusion in the topic I already gave link to, you have to substract even 6 LI steps from the ST maximum load to give the tire a yust as save deflection then a LT tire with speedcode Q = up to 160km/99m/h. then only about 2850 lbs maximum load.
The LT tires with 85R16 only slightly more maximum load of 3020 but probably for 140km/86m/h so also for 99m about the same maximum load.

But to law these LT's are not allowed because they have to carry with the 4 of them the GAWR wich is probably 13990-10%= 12598 so more then 4 times 3020= 12080 .
And thats the strange thing here, that tough to laws of nature the LT's can carry yust as much load savely and with long lasting tires, they are not allowed to law.

Someone wrote also 18% pinweight and that is not allowed by law in america as far as I learned, 15% is maximum allowed.

Here the picture with the ST tires maximum load left as its given and then even warning of poor reserve to my standards, and an advice of 83 psi , so a bit above AT-pressure, and a reduction to 65m/h , but that is going from N speedrated 140km/86m/h so this even lower advice speed.
I did not use your low weighed loads , are they for fully filled 5th-wheeler? If you would reduce the maxload witht the system of mine, advice-pressure would go sky high. and only low speed advice.
So a at least F-load tire in same sises LT would be advicable.
But then you have to mind if the rimms are allowed that higher pressure .

[dustin3532]

jadatis wrote:
If you want to compare the tires , read first my topic about it.
comparing tires for replacement

But the overloading is probably the cource.
This can also be for one tire.
so where it always the same tires that blew, or did you have all tires once damaged?
For trailers and 5th wheelers with tandem or tripple axles crossed weightdifferences are more rule then exception.
You have to use pressure needed for the load on the most loaded tire , for all the tires.

To know that weighing is the only way, preferably per wheel(pair), second best axle weighing, but as long as you did not do that , we will have to do with the GAWR's.

You can build in some extra reserve by putting 10 psi higher pressure in the tires then that written on sidewall. Its allowed by TRA for LT and ST tires up to 10 psi, and even 20 psi for truck-tires.
This pressure on sidewall, called maxloadpressure or reference-pressure is not the maximum pressure of the tire, wich is only given on P-tires and XL/reinforce/Extraload.

so give the missing data , and I will produce a picture of my calculator with pressure advice and extra info.
Probably will use the motorhome calculator, if you give seperate wheel-weights.

its not the same tire everytime .....all 4 different tires have had issues

[NC_Hauler]

dustin3532 wrote:
Went and weighed it today!!!!

Steer axle 5040
Drive axle 6080
Trailer axles 10800
Gross 21920

That's with a full tank of water but minus our clothes and food

It appears you only have 10,800# on your two 5er's axles, (rest of weight of 5er,, pin weight), is setting in the bed of your truck...

So "E" rated LT tires that can handle 3040# (believe that's right), at 80 psi, would handle 12,160# of weight and at this weighing, you only have 10,800# on the axles. Still believe a good E rated LT tire would work for you....

[dustin3532]

Went and weighed it today!!!!

Steer axle 5040
Drive axle 6080
Trailer axles 10800
Gross 21920

That's with a full tank of water but minus our clothes and food

[Infinityrver]

Dustin,

Like someone here has commented.........is it just one tire or on the same axle every time? If so, I'd find out if the axle bent.

I have elcheapo "ST" china tires on my 5er. They came original on my 2012. They are Akuret st235/80r/16. My trailer was 12,232lbs. before I loaded it up with stuff. I have travelled twice to Florida from Maine. Also, spent time hitting different campgrounds throughout Maine and Florida.

I have over 11,000 miles on my tires and they are all wearing even. I keep 80 psi in them at all times. I also, check tire pressure every time I hook up to my tow vehicle.

My fear is if your axles are bent or cockeyed then no matter what good tire you place on it it will still wear your tires out.

Good luck, brotha!

Have your axles checked with a reputable camper repair facility.

[Veebyes]

So many possibilitys. Alignment, weight, pressure, loose hardware? Had blowout & near blowout out opposite side, same time, 2 years ago. Can't confirm the cause but I did find a nut missing from one of the U bolts & the rest, both axels, were loose.

Check everything.

[garyp4951]

If your axles have more than 11k on them I would get a G rated tire. A 7k 8lug axle has the same size bearings, but bigger brakes.

[NC_Hauler]

Agree with Chris and JIMNLIN on this also....an E rated LT tire should work for you. I had a Coachmen with a GVW of 14,500# and used Michelin XPS RIBS on it and never had an issue.

You state GVWR of 13,990#, or something to that effect, but later on you state you may be heavier:h..I'd want to know the actual GVW of my 5er....I also believe, if 5er's GVW is 13,990# as you stated, putting a 17.5" wheel and tire on, or even a G rated tire on is over kill.

As stated by the above two..purchase one of the recommended better LT E rated tires and unless something is going on with your axles being out of alignment, you should be good to go.

[JIMNLIN]

Me Again wrote:
Dustin, you are receiving some good advice and some questionable advise. You can just install Michelin XPS Ribs or Bridgestones Duravis R250s LT235/85R16E on your existing rims, inflate them to 80 pounds and go RVing for 6-8 years without worrying about tire problems. ST tires was never going to give you that kind of reliable service.

17.5 rims and tires are an overkill for your trailer. The R250s are a bit cheaper than the RIBs but just as good. I have ran both. I just

If you have not jointed the www.CardinalRVClub.org forum you should.

Chris

Agree with Chris on this one. You don't need a 17.5" wheels/tires on a trailer with 6k axles. Kinda' like putting 22.5" semi tires and wheels on a 1500 pickup truck.
The Ribs or the R250/M895 are a commercial grade all steel ply carcass tire that gives a owner years of trouble free service.

Some suggest you do a search on the subject. You'll get a better cross the spectrum input of ST tire issues by doing a google on the subject. Thousands of heavy trailer owners 9not just RVs) have been in your shoes and upgraded to a 16" LT E on 6k axles and have no more tire issues.

I sure wouldn't put any brand of ST tire back on that heavy trailer.

Do not put more air pressure in any tire above max listed on the tire before first asking the tire dealer if the new tires warranty will be any good. Check with your dealer first before doing so.
I've bought more same size tires/brands for my work trailers in a year than many folks will ever own. Non of the tire dealers or their mfg's recommended using tire pressures above max listed on the sidewall. Doing so can void a new tire warranty.