Tire wear on rear - inside shoulder

[Lonestar_Nomad]

Curious what your thoughts are on this tire wear. I do not see any rub marks on suspension or liner which leads me to believe the toe is the problem, but it seems pretty mild judging by the spec sheet. Both rear tires show similar wear patterns with the left being worse. No issues on the front. Car is mildly lowered in HKS hipermax R coilovers. Pressures typically around 36-39 based on the tire displays recommendation. 11k on the odo, about 4k at the “after” specs on the alignment sheet.

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[razorlab]

100% toe. Alignment is off.

Either car wasn't setup correctly on alignment rack or something slipped after.

 

[Lonestar_Nomad]

100% toe. Alignment is off.

Either car wasn't setup correctly on alignment rack or something slipped after.

Thank you razor. I’ll get it back on the rack this week and see what’s going on. Appreciate you taking a look.

 

[Hasan]

Might want to check bushings on the rear arms

 

[exe36m3]

Might want to check bushings on the rear arms

Agree on looking but 11k miles on the stock arms seems pretty low to have suspension wear issues.

The wear looks like camber versus toe as the tire looks pretty smooth across the face of the tread.

OP, were those alignment specs before or after the springs install? Lowering the car will induce more camber and thus more inner tire/shoulder wear.

 

[Lonestar_Nomad]

Agree on looking but 11k miles on the stock arms seems pretty low to have suspension wear issues.

The wear looks like camber versus toe as the tire looks pretty smooth across the face of the tread.

OP, were those alignment specs before or after the springs install? Lowering the car will induce more camber and thus more inner tire/shoulder wear.

Alignment was done about 700~miles after the coilovers were installed. No adjustments were made to height etc post alignment.

 

[tracer bullet]

I won't disagree with toe, but at 0 and -.01 it's not way off.

-3 camber is a lot, it's great for grip but I'd be thinking that's more likely it.

 

[Lonestar_Nomad]

I won't disagree with toe, but at 0 and -.01 it's not way off.

-3 camber is a lot, it's great for grip but I'd be thinking that's more likely it.

Those are the fronts. I’m having issues with the rear. Front shows no signs of weird wear oddly enough, even with the more aggressive toe and camber.

 

[tonymimi]

You probably need more camber on rear?

Reference:
https://www.supramkv.com/threads/stock-rear-camber-adjustment.18950/post-300006

 

[razorlab]

You probably need more camber on rear?

He has -2.5 in the rear. More than enough, especially on the street.

 

[tracer bullet]

Those are the fronts. I’m having issues with the rear.

Oh, hell. Sorry. Yeah I'm on board w/ the positive toe not helping there for wear. Camber could also contribute to a percentage of that as well.

 

[razorlab]

Oh, hell. Sorry. Yeah I'm on board w/ the positive toe not helping there for wear. Camber could also contribute to a percentage of that as well.

That rear toe is in spec. Not the issue. Again, either that machine isn't setup correctly, the car wasn't settled at the time, or something slipped after the fact.

If you just look at the sheet, everything looks fine.

 

[tracer bullet]

That rear toe is in spec.

Ugh, I can not read today. I was thinking slightly negative toe was the norm but no. I looked back at my own notes and indeed about .15 positive is where I landed. I'll just shut up now.

 

[razorlab]

Ugh, I can not read today. I was thinking slightly negative toe was the norm but no. I looked back at my own notes and indeed about .15 positive is where I landed. I'll just shut up now.

Negative rear toe would definitely make the car "lively". hahha

 

[Johnny Utah]

Could it be all the curves and twisty roads you’re tearing through? I suspect that was my issue after multiple trips to North GA. ?

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