Please suggest something. At my wits-end!

RubberCtyRauder said:
Your Kuhmo load rating in the 235-50-18 is 97 or 1609 lbs. the load rating of the Cooper RS3A, and I believe the BFG OEM was the same, is 101 or 1819 lbs. Your sidewalls are too soft for the heavy car is my bet.
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That very same thought popped into my head too.
Hmm...I wonder.


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Rockettman said:
Would the Road Force not show a "bad tire"? Would it not show-up as "unbalanceable"?
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It is possible to bring an out of round tire in to balance.

When the "balanced" OOR tire is installed the lateral motion of the OOR tire causes the vibration, not an imbalance (think clown car wheel).

1 or both of the tires are defective and you need to hold the mfg responsible.

Others with the same tires may not experience the issue only because theirs came from different production batches than the ones with the problems. I don't have problems with mine is non sequitur - just lucky to have units from a good batch.

Other manufactures have the same issue. The Nitto 555's I put on the front of my MM are **** from the start. Refused to balance. Finally after RFB the vibe is gone but the damage is done. The poor quality causing imbalance issue had enough miles driven to cause tread imperfections. Getting new tires and will throw these on the rear and let the Trilogy have its revenge... :-)
 
RubberCtyRauder said:
Your Kuhmo load rating in the 235-50-18 is 97 or 1609 lbs. the load rating of the Cooper RS3A, and I believe the BFG OEM was the same, is 101 or 1819 lbs. Your sidewalls are too soft for the heavy car is my bet.
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The OEM BFG 235/50/18's fronts are 97W. The OEM BFG 245/55/18's rears are 103W.
 
See if they'll take them back, even if there is a bit of a loss, you're going to hate driving your car the way it is. I've got pirelli scorpions with 285/50 in the rear, smooth as silk and super quiet. I've also ran Nitto's on a blue that I had and was very pleased with them too.
 
JimP said:
See if they'll take them back, even if there is a bit of a loss, you're going to hate driving your car the way it is. I've got pirelli scorpions with 285/50 in the rear, smooth as silk and super quiet. I've also ran Nitto's on a blue that I had and was very pleased with them too.
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I think that'll have to be my next course of action.
I "do" dislike driving it now. And that's not good!
Also after some of the Consumer Report posts there...I don't really want to.
 
Fastbob said:
https://www.consumeraffairs.com/tires/kumho.html

Read the 3rd post at the link. Seems others have the same issue with those tires as you.
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I find it interesting the BFG's on consumer affairs website have a 1.4 rating out of five. I've never thought much about consumer affairs' opinions on any product as they are prejudiced according to who is buying ad time.

The multiple stories of people "hitting curbs (all the time) and never had a problem" until Kumho are almost amusing or the overloaded vehicle on very hot pavement.

I'm not saying Kumhos are the greatest thing since apple pie, just that all products these days have their problems. We don't even want to get into the story about my truck's $280 a piece Michelins that came apart.



https://www.consumeraffairs.com/tires/goodrich.html?page=2
 
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Rockettman said:
How do I go about "proving" that to a tire place though?



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Pretty easy, have them mount and balance them and then take the technician or the manager for a ride and show them what the problem is. Tell them to either fix it or replace the tires.
 
Fastbob said:
Pretty easy, have them mount and balance them and then take the technician or the manager for a ride and show them what the problem is. Tell them to either fix it or replace the tires.
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Yeah, they just RF'd them two days ago (for the second time), so shouldn't be too hard to show them.


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Rockettman said:
Yeah, they just RF'd them two days ago (for the second time), so shouldn't be too hard to show them.


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Trying to balance an egg shaped tire it is nearly impossible to remove the vibration cause the shape of the tire is causing the vibration not the balance.
 
Fastbob said:
Trying to balance an egg shaped tire it is nearly impossible to remove the vibration cause the shape of the tire is causing the vibration not the balance.
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Would that not suggest then, that there is nothing wrong with the shape of the tire? (In this case, "my" tires?)
If the machine was able to do it; then it's not egg-shaped. Yes? No?


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Tire may be out of round on the machine or at speed. Could be one or both, If the tire was round and just out of balance it would have balanced. I'll bet it is very slightly egg shaped at speed and it doesn't take much for it to vibrate.
 
Fastbob said:
Tire may be out of round on the machine or at speed. Could be one or both, If the tire was round and just out of balance it would have balanced. I'll bet it is very slightly egg shaped at speed and it doesn't take much for it to vibrate.
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Gotcha. Makes sense.


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Years ago I bought some Goodyear tires for my 73 Gran Torino Sport. How long ago you ask! Well some of us old timers remember Woolco , plus the car was a new "73". Anyway had a similar situation vibrating over certain speed. I would check the tire and it would get warm, finally noticed it had a small area where there was a raised spot. Took the tire back and they said it was a twisted belt. Not too long after that I had a blowout on the left front. The tire tore the "HE double hockey sticks" out of the fender and wrapped it
self around the A-frame and ball joints. That tire was purchased the same time as the other bad tire. Moral of the story I wouldn't drive much on that tire until you get the problem resolved.

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Shornaday said:
Years ago I bought some Goodyear tires for my 73 Gran Torino Sport. How long ago you ask! Well some of us old timers remember Woolco , plus the car was a new "73". Anyway had a similar situation vibrating over certain speed. I would check the tire and it would get warm, finally noticed it had a small area where there was a raised spot. Took the tire back and they said it was a twisted belt. Not too long after that I had a blowout on the left front. The tire tore the "HE double hockey sticks" out of the fender and wrapped it
self around the A-frame and ball joints. That tire was purchased the same time as the other bad tire. Moral of the story I wouldn't drive much on that tire until you get the problem resolved.

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Thank you on that. Won't take much to convince me of that advice! ^^^


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Anyone had experience/advice with "Toyo Extenza HP's"?
That's the other choice that may be available to me. (But also checking on the Cooper RS3A)


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I have always liked Toyo tires. For what it is worth, my son likes his Kumhos, but they are not for me. I run Firestones on my Marauder, but I would consider Toyos. Keep in mind that you can get a bad tire no matter what brand you buy. Best of luck with it.
 
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