Inner tire wear issue

[RocketGuy3]

I believe it's a well known thing that the inner side of the front tires on our Mach 1s wear out quickly/unevenly, but the only suggestion I've heard is to align the front tires with more toe in. I tried such an alignment, but the tech at the tire shop (Discount Tire, which may be my problem. as they're pretty hit and miss.. the guy didn't seem like the most experienced) told me that anymore toe in would cause the steering's neutral position to be off center, and the car wouldn't naturally drive straight.

What I'm wondering are are there any other potential solutions for the tire wear on this car?

I've had similar issues on a previous RWD touring car where all the toe adjustments in the world didn't seem to be sufficient. But what ultimately fixed it was stiffer LCA bushings. The reasoning being that stiffer bushings limited the amount of wheel deflection around the kingpin under both braking and acceleration. Both braking and accelerating rotates the tires around the kingpin giving more toe out than desired. It has the added bonus of slightly more responsive steering and turn-in.

Other info:
- I don't have the handling pack
- Bone stock
- 99% "spirited" street driving, but I have done one fairly aggressive track day

My most recent alignment:

Thanks for any suggestions.

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[Rael]

My understanding is that such wear occurs because these cars are set up for track uses. If the car will never be tracked, the alignment can be adjusted, but then it won't perform well for high performance driving.

This, I was told.

 

[NightmareMoon]

You have enough front toe in. IDK what he’s talking about with more toe causing it to not steer straight, but he’s right you dont need more thatn that.

 

[RocketGuy3]

You have enough front toe in. IDK what he’s talking about with more toe causing it to not steer straight, but he’s right you dont need more thatn that.

From what I have read, I thought it would be sufficient, too, which is why I didn't bother creating this thread for a while despite getting this alignment last year... Although to be fair, I'm no longer certain how much of the wear happened before the alignment.

 

[Gchab]

Before your alignment you had toe out which would cause your inside tire wear. Your alignment specks after would solve your wear problem. The wear you are seeing is still from the previous alignment settings. You should be good now with your settings. The mechanic though is wrong about the steering's neutral position to be off center, and the car wouldn't naturally drive straight with more toe.. But with to much your you could then get more were on the outside of your tires.

 

[RocketGuy3]

Yeah, what you're saying makes sense. I remember seeing additional uneven inner tire wear after my alignment, after which I did my track day and a few thousand more street miles, but I don't entirely trust my memory right now...

 

[WItoTX]

I'd toe your rear wheels in, and the car would feel more stable under acceleration around corners. Otherwise, the tweak you made to the front should solve your problems with wear. Toe out is hard on tires.

 

[Keeffa]

It took a few years to find someone willing to take a bit of extra care and some fine adjustments to get even wear. I was also advised to run the front with 40 psi in them to help even tire wear. It's working.

 

[Southview]

Toe front in -.03.
rears toe -.10-.13
tires will wear nice and even
no need to increase tire pressures.

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