Wrong tires cause other issues?related topic"spring issues"

[hdwhitten]

After purchasing kz Durango gold 5th wheel, 1 year later got a recall letter. Tire size listing on sticker was incorrect please install new sticker to "prevent any new tires being installed with the wrong size".
New sticker: ST235/85R16G load range G
Original tires ST235/80R16 load range E
My question is could the tires have contributed to my spring issue of flattening out by having weaker side walls, not enough load carrying capacity? Between a heavy 5th wheel, bad roads, faulty springs(1 side only,both axles) could the tires contributed to a percentage of this failure? It's about 900lbs a tire difference in load carrying ability. Didnt know if it would have effect on the springs.
Thanks for the input

[Old-Biscuit]

1st a question:
Sticker Recall ...new sticker 'G' tires


Wrong sticker info BUT were wrong rated tires actually installed ('E' Rated Tires) OR was it just wrong info on sticker and 'G' Tires were acually used??????









Springs are rated for carrying capacity....3200#, 3500# etc.
They should be same rating as the axles


Flatting of springs is result of under rated springs and effects of 'dynamic loading' (bumps, abutments, potholes, off set joints etc)




Tires are rated to carry load.........under-rating results in TIRE damages
Under-rated/over loaded tires can create increased 'dynamc loading' issues



Suspension system components work together...each can affect each other
Failure is usually seen FIRST with weakest component

[Alpine36]

Originally Posted by hdwhitten

After purchasing kz Durango gold 5th wheel, 1 year later got a recall letter. Tire size listing on sticker was incorrect please install new sticker to "prevent any new tires being installed with the wrong size".
New sticker: ST235/85R16G load range G
Original tires ST235/80R16 load range E
My question is could the tires have contributed to my spring issue of flattening out by having weaker side walls, not enough load carrying capacity? Between a heavy 5th wheel, bad roads, faulty springs(1 side only,both axles) could the tires contributed to a percentage of this failure? It's about 900lbs a tire difference in load carrying ability. Didnt know if it would have effect on the springs.
Thanks for the input

Doubtful this would contribute to spring failure. Tires and axles are "unsprung weight", in other words the springs do not carry that unsprung weight. I'd be more concerned with why the manufacturer upped the load rating requirement on the tires, and do the original axles, springs and suspension components match the weight of the load? Sounds like a trip across the scales is in order.
Manufactures typically don't issue recall out of the kindness of their hearts. Usually lawyers are involved. My guess is the trailer was equipped with tires and suspension components that marginally sufficed. If the axles and suspension are loaded within 90% of capacity continually you may want to consider an axle/spring upgrade.

[Cumminsfan]

In the specs there's several Gold models that have just over 2000 lbs for CCC. Add batteries and propane plus any add on options and you could easily be under 2000 lbs for CCC.
Load up like most and you're maxing out your suspension.
My guess is that you're maxed on your spring rating and over time they've flattened out from too much weight.
If by chance you do have a high CCC then it could very well be that KZ has the wrong springs on your 5er that don't match the sticker.

[hdwhitten]

Originally Posted by Old-Biscuit

1st a question:
Sticker Recall ...new sticker 'G' tires


Wrong sticker info BUT were wrong rated tires actually installed ('E' Rated Tires) OR was it just wrong info on sticker and 'G' Tires were acually used??????









Springs are rated for carrying capacity....3200#, 3500# etc.
They should be same rating as the axles


Flatting of springs is result of under rated springs and effects of 'dynamic loading' (bumps, abutments, potholes, off set joints etc)




Tires are rated to carry load.........under-rating results in TIRE damages
Under-rated/over loaded tires can create increased 'dynamc loading' issues



Suspension system components work together...each can affect each other
Failure is usually seen FIRST with weakest component

Old biscuit, that's what im getting at. New sticker "G rated tires". Tires on camper "E rated tires" 14,995 GVWR, 7,000 LB AXLES, 3500 SPRINGS. I have only about 4,000 towed miles on camper and already flattened passenger side springs. They build them to close to failure, you put the washer and dryer in, upgrade the mattress , put things in underbelly and now what. Why not 8,000lb axles, 4,000lb springs and the correct tires. Now im in my home state, far from Dealer, issues happen right at 2 years( unless I didnt notice earlier) and I'm screwed. But they sold a camper, got it off there lot and down the road knowing is going to fail. Brakes will fail next probably because of everything...this is extremely frustrating. I'm pissed. 90,000 dollar sticker price( didnt pay that of course) you think they wouldn't cut corners so closely. When buyers get more knowledge it's too late.

[Cumminsfan]

Whats you loaded axle weight?

[jacknife]

From what l have read KZ in a first class out fit . Why don’t you take some pic of your suspension . Get a weight ticket . Call their Warranty rep and explain your problem without ranting or casting blame . Most outfits will either cover it or a large portion of it .

[Mtn. Lion]

There is a two year warranty on that rig. Tell them to put on new G rated tires while they are fixing the springs.

[FastEagle]

There is too much missing information here to make anything but a hypothetical comment.

#1, Did the trailer, at the time of first sale have LRG tires installed but described on the certification label as LRE? Did the certification label have a recommended 80 PSI recommended cold inflation pressure listed for the installed tires?

#2, If the trailer in fact had LRG tires and they are the correct tires for the GAWRs they would be underinflated at 80 PSI and the tires should have also been recalled.

#3, when the vehicle manufacturer has made a mistake with a certification label, it's a safety violation and warrants recall action. The vehicle manufacturer can initiate the recall action or NHTSA can force them into a recall action. Either action is a recall and abides by the rules for recall action. All recall actions are at the expense of the vehicle manufacturer. That leads you back to the 80 PSI in LRG tires.

#4, if the tires had already failed you would have a valid grievance about other equipment that could suffer from the failure (s). Otherwise, the label recall is a single action for the items mentioned in the recall.

What is the actual designated size of the OE tires? ST235/80R16 or ST235/85R16?

[imjustdave]

I had a flat bed trailer 7k axles x2. And manufacture installed D tires with E tires called out on the sticker. I caught it first month as I had tire issues. Simple call to manufacture and they gave me money to buy new tires. If your ties are underrated and the sticker was wrong. I feel they need to make you whole. Axles, springs might be wrong as well.

If they claim out of waranty, I would point out they sold you under rated equipment and the recall of the sticker proves this and should be an extension for warranty of items related. and a new sticker doesn't magically fix everything. But new tires, properly rated axle and springs would.

Not saying the axle and springs rims are wrong but you need to verify.

[hdwhitten]

Originally Posted by imjustdave

I had a flat bed trailer 7k axles x2. And manufacture installed D tires with E tires called out on the sticker. I caught it first month as I had tire issues. Simple call to manufacture and they gave me money to buy new tires. If your ties are underrated and the sticker was wrong. I feel they need to make you whole. Axles, springs might be wrong as well.

If they claim out of waranty, I would point out they sold you under rated equipment and the recall of the sticker proves this and should be an extension for warranty of items related. and a new sticker doesn't magically fix everything. But new tires, properly rated axle and springs would.

Not saying the axle and springs rims are wrong but you need to verify.

E rated tires on camper new, ST235/80R16
recall new label ST235/85R16G..MY OPINION JUST A LABLE CHANGE AND MAKING SURE " NEXT TIRE CHANGE THE CORRECT SIZE GETS PUT ON" ACCORDING TO THE LETTER. Now I have spring issues,