Rear inside tire tread pattern

W

will-dan1

New member
:help:Any ideals on what could be causing this inside tread issue? Its happening to both rear tires.
 

Attachments

  • rear tire tread-1.jpg
    rear tire tread-1.jpg
    97.3 KB · Views: 106
It looks like the inside treads are cupping. You should take it to a good alignment shop that can do a 4 wheel alignment. Wear like that can be caused by a number of things, including improper inflation, out of balance tires, worn or failed suspension bushings, etc. You really need to take it to be fully inspected.
 
Thanks all...I have been using about 40 psi lately.
That pic of the new tire does look like that, guess its designed like that from the beginning...
Didn't realized that the merc's had 4 wheel alignment, just thought cars that had IRS had to have that done, like my older corvettes did.
As always, my fellow marauder heads answered my question....
:beer:
 
Alignment can be out of wack in the rear even on a solid axle car. Control arm bushing wear, link wear, tweaked frame, etc. can misalign the rear axle. It's good to have everything checked out.
 
For the benefit of newer members who may not know, it is also common to have high centre-tread wear with the stock-size rear tires when running the factory-recommended pressure. Counter intuitively, the solution is to run higher pressure. The explanation, from BF Goodrich themselves, is that the factory tire/rim size combination causes the tire to "balloon" at highway speed and high pressure counteracts this.
 
RF Overlord said:
For the benefit of newer members who may not know, it is also common to have high centre-tread wear with the stock-size rear tires when running the factory-recommended pressure. Counter intuitively, the solution is to run higher pressure. The explanation, from BF Goodrich themselves, is that the factory tire/rim size combination causes the tire to "balloon" at highway speed and high pressure counteracts this.
Click to expand...


Good to with me running BFG's on the rear...:D
 
Cupping is caused by the tire hopping up and down while rolling. Normal causes in order of probablility are tires out of balance, worn suspension dampers (shocks) and then rear end attaching points (trailing arm and Watts link bushings).

There is no way to "align" a rear end on MM. The mounting points on the frame and rear end are fixed via jig when the frame is built and the brackets put on and drilled on the rear end housing. There is no adjustment.

At about 100K miles, especially on rough roads, the rear bushings start to get "soft" and deflect more over bumps. You can't move the rear end when the car is on a lift, but whill see the bushing rubber deflection when the parts are removed for replacement.

Again, the cupping caused by the rear tires hopping up and down. Just have to figure out the cause. Good luck.
 
Thanks all....I've only got 54K on her so far, but haven't had the rears balanced since last tire changes..if they did it then.
Sounds like a trip back for a check up.
And as far as burnouts....well, never have did one on her before...to afraid of breaking something else.....:burnout:
 
Is it on both sides? Do you feel or hear anything when driving? I would add to vegasmarauders input by adding possible broken cord
 
RF Overlord said:
For the benefit of newer members who may not know, it is also common to have high centre-tread wear with the stock-size rear tires when running the factory-recommended pressure. Counter intuitively, the solution is to run higher pressure. The explanation, from BF Goodrich themselves, is that the factory tire/rim size combination causes the tire to "balloon" at highway speed and high pressure counteracts this.
Click to expand...


What pressure is best? 40? 45?
 
You must log in or register to reply here.
Back
Top