Tire cupping

[Rockcrawlindude]

Left front tire.
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Right front tire
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Left rear.

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Dang yep those are cupped

 

[Crusty old shellback]

Ok, new track bar is in.


Rechecked everything and can find no play. However, there is less movement on the new track bar compared to the old one.
Checked toe with a tape measure and it's at O.
Waiting on shocks to show up.

 

[Crusty old shellback]

So with just the new track bar installed, I went into town today. 60 mile road trip.
Truck feels better and LA lot less vibration in the steering. Didn't notice any death wobble where I usually do. Tires are a bit quite as well. Shocks should be here tomorrow.
Progress was made.

 

[dieselscout80]

I just wonder if those MT Baja Boss tires are just prone to cupping.

I walk by two rigs (new style Silverado 1500 and Jeep Gladiator) with them almost daily and they both show cupping. No idea on care given to them or the mile. The Silverado tires are bad with cupping, but the Jeep's are showing it too and they are closer to new than yours or the Chevy's.

 

[1964PW]

I have about the same tires but in the metric size. Cupping issue showed up very abruptly into the 2nd summer season after switching from my winter tires. No wear on my winter tires before or after I had the cupping. My cupping was from the rear though. I did do Carli R2, Fox IFPs and a Thuren trackbar a few weeks ago on the rear. Factory shocks were still charged after 63k. Hard for me to not blame it on the Baja Bosses. Idk I'm rotating around it and will switch to 37s sooner rather than later and probably back to Nittos, Toyos or the new BFGs.

 

[Crusty old shellback]

Thanks guys. My fox IFP shocks will be here today. Hope to get them on soon.
These tires are about done. Was hoping to get another 5K or so out of them.
Probably go back to BFGs and the new KO3s. Not sure if I'm going to 37 or stay with 35s

 

[Crusty old shellback]

So new track bar and new shocks are in and got some miles on them.
I can't say it fixed the issue, but it seems to have slowed down. Maybe the tires are slowly wearing smooth.

I did stop by 4WP today asking about the warranty. But since I didn't but their warranty, and they didn't install the tires (another long story. Basically legal mumbo jumbo on the tires and my truck) I now have to contact MT about it.
I'll see how the tires do a bit longer. May call them Monday if I have a chance and see what they say.
4WP said they have never heard of any issues with the tires

 

[Crusty old shellback]

So got a few miles on the truck now with the new track bar and shocks.
Seems the cupping has subsided. There is still some there, but it's slowly wearing away.

I do still get some death wobble at times when I hit a hole in the road. I'm going to see about replacing tie rods and maybe a steering dampner. 64K miles on the truck now.
And I'm going to need new tires anyways before winter. Kind of holding out for the new KO3's.

 

[1964PW]

Any more updates with the cupping? I went out and really looked at my winter tires and the cupping is showing on them too. Did your OEM shocks still have pressure when ypu swapped them? What track bar did ypu go with?

 

[Crusty old shellback]

So I installed a APEX drag link and Tie Rod. Got new tires. Aligned to 0 toe. No cupping so far. Have about 5K miles on it now.
I installed the Carli front track bar and Fox 2.0 shocks. Old ones still had pressure.
I also installed a Thuren rear track bar.
Truck seems to be back to normal. 68K miles on her now.