Tire cupping
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6th Gear
Joined: Nov 2024
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Tire cupping
O have a 2002 Ford 7.3 2wd my tires started cuping about 10k miles ago can'tdrive over 70mph or my fillings will pop out . Went to get them road force balanced and the shop told me they wouldn't do it suggested i get new shocks. I have Rancho 9000xl adjustable shock i installed about 40k miles ago, is that typical life span for Ranchos ? Any good recommendations for replacement shocks?
FTE NC Chapter
Joined: Oct 2007
Posts: 2,967
Likes: 68
From: Coastal NC
I'd start with the easy stuff first before replacing the suspension.
Rotate, balance, alignment.
Tire pressure.
Check for play at the ball joints.
Some tires just suck. In my personal experience, Micky Thompson and Dick Cepek tires sucked from day one. Loud. Early cupping. Uneven wear. That's not to say they all do but mine did. I couldn't get rid of them quick enough. I knew my suspension and steering components were good. Never had any luck with BFG's either but I know plenty that run them just fine.
You didn't mention what brand and size tires, or stock rims, or if you had spacers.
I've never had any rancho products but one would think you'd get more than 40k on a set of shocks.
Rotate, balance, alignment.
Tire pressure.
Check for play at the ball joints.
Some tires just suck. In my personal experience, Micky Thompson and Dick Cepek tires sucked from day one. Loud. Early cupping. Uneven wear. That's not to say they all do but mine did. I couldn't get rid of them quick enough. I knew my suspension and steering components were good. Never had any luck with BFG's either but I know plenty that run them just fine.
You didn't mention what brand and size tires, or stock rims, or if you had spacers.
I've never had any rancho products but one would think you'd get more than 40k on a set of shocks.
Thread Starter
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6th Gear
Joined: Nov 2024
Posts: 6
Likes: 0
I'd start with the easy stuff first before replacing the suspension.
Rotate, balance, alignment.
Tire pressure.
Check for play at the ball joints.
Some tires just suck. In my personal experience, Micky Thompson and Dick Cepek tires sucked from day one. Loud. Early cupping. Uneven wear. That's not to say they all do but mine did. I couldn't get rid of them quick enough. I knew my suspension and steering components were good. Never had any luck with BFG's either but I know plenty that run them just fine.
You didn't mention what brand and size tires, or stock rims, or if you had spacers.
I've never had any rancho products but one would think you'd get more than 40k on a set of shocks.
Rotate, balance, alignment.
Tire pressure.
Check for play at the ball joints.
Some tires just suck. In my personal experience, Micky Thompson and Dick Cepek tires sucked from day one. Loud. Early cupping. Uneven wear. That's not to say they all do but mine did. I couldn't get rid of them quick enough. I knew my suspension and steering components were good. Never had any luck with BFG's either but I know plenty that run them just fine.
You didn't mention what brand and size tires, or stock rims, or if you had spacers.
I've never had any rancho products but one would think you'd get more than 40k on a set of shocks.
Logistics Pro
Joined: Jan 2007
Posts: 3,827
Likes: 103
From: Martinsburg, WV
These things eat shocks, especially if you have weak springs and no/worn bumpstops. I ate through a set of Bilsteins in about 25k.Do not count out the shocks. They are the primary cause of cupping.
Laughing Gas
Joined: Nov 2020
Posts: 994
Likes: 367
From: Republic of Texas
Mud tries are bad about cupping. Soft and chunky tires will cup, just a matter of when.
Shocks with proper re-bound help. Tuning required and lots of time. Agree with the above on that, they are important. Tight suspension and aligned will also help.
However, once you start cupping rotate the tires to the other end and it may help. But, once you get cupping started it will continue unless you shave the tire round again.
Shocks with proper re-bound help. Tuning required and lots of time. Agree with the above on that, they are important. Tight suspension and aligned will also help.
However, once you start cupping rotate the tires to the other end and it may help. But, once you get cupping started it will continue unless you shave the tire round again.
Thread Starter
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6th Gear
Joined: Nov 2024
Posts: 6
Likes: 0
Mud tries are bad about cupping. Soft and chunky tires will cup, just a matter of when.
Shocks with proper re-bound help. Tuning required and lots of time. Agree with the above on that, they are important. Tight suspension and aligned will also help.
However, once you start cupping rotate the tires to the other end and it may help. But, once you get cupping started it will continue unless you shave the tire round again.
Shocks with proper re-bound help. Tuning required and lots of time. Agree with the above on that, they are important. Tight suspension and aligned will also help.
However, once you start cupping rotate the tires to the other end and it may help. But, once you get cupping started it will continue unless you shave the tire round again.
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6th Gear
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Everything on the front end was replaced 2 years ago, alignment is a year old. She drives staright, drives smooth for the most part except when I get above 70mph
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