Tire cupping...Suggestions

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Does anyone have suggestions on why my tires are cupping so badly? I had a set of Goodyear Workhorse m/s and after about 15k they were cupped so bad I had to get rid of them. I now have the Rickson 19. 5" with Toyo m/s. The front tires are already showing signs of cupping after only a few thousand miles. What in the front end is possibly causing this? Any suggestions would be appreciated.
Thanks,
Ed

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1999 QC SLT 4x4 LB 2500 Cummins, 6 speed, HD.


[This message has been edited by Ed (edited 09-18-2000). ]

 

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Usally Cupping is caused by bad shocks. Yours are really not that old. Check to see if they are leaking oil.

 

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Imo - Factory shocks are toast by 10k miles and not too good even when new. I'd replace the shocks and find a good shop to check the front steering and suspension componants.

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2001 HO 6 speed Regular Cab SLT 4x4 3. 54 anti spin 2500. Used for the daily grind and sneaking away to some secret Baja beaches toting a cabover

 

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Cupping is a problem that most of us will eventually experience over time. Short of buying the exact same tire for the rest of our lives.

Too often this is simply the result of failing to maintain proper tire pressure. However, this is far from a complete answer.

Cupping is a phenomena that is absolutely normal. Excessive cupping or excessive wear on one side of the tire as compared to the other is not.

There are at least eight causes of cupping and/or uneven wear:

1. Most roads are banked away from the center or crowned as most like to call it in my area.

2. Your tires 'scuff' when you force a speed change with them. The rear tires scuffs when you accelerate and when you brake.

3. Alignment.

4. Carrying an unevenly divided load.

5. Defective or worn shocks.

6. Excessive front brake.

7. Tires containing large stand-alone tread blocks

8. Air pressure

Mud tires are notorious for cupping. Mainly due to number 7. Some guys call it (Tread Squirm) MUD tires require far more rotations and are more sensitive to air pressure levels.

With all of that said... I don't know what your problem is, but IMHO, it sounds like a combination of #5 and/or #7 and #8.

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98. 5' 24v 2500 Auto/3. 54 4x4 SB QC. Everything but leather. PIAA 1200's, AMSOIL dual filter relocation system, Smittybuilt Stainless Steel Nerfs, Rhino Liner(Junk), K&N air filter(For Sale)15 year AMSOIL dealer. Time permitting, Soon to include Ultra-lite Pyro,0-50lbs boost, Trans temp in the pillar. Rancho 9000's with in cab adjustment.

 

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Out of all the posts here,no said HOW ABOUT
tire rotation?I rotate mine every 4000 miles
that keeps the cuping to a minamum for ME.
I have 28000 on my BFGs,and they are still like new. 295-75-16

 

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Thanks for the suggestions. I will look into the shocks as I check tire pressure and did rotate tires.

I received two e-mails from Ford friends referring me to this topic and then suggesting I should have bought a Ford. I guess the Ford guys are over here cause they wish they bought a Dodge. #ad


Hey guys, if you read this... I still love my Dodge and will keep it rather than go to the dark side. #ad
#ad


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1999 QC SLT 4x4 LB 2500 Cummins, 6 speed, HD.