[Justin_F32]

So I’m having some rear inner tire wear on both rear wheels, I’m lowered on H&R super sports and I got an alignment the last time I changed tires for the same reason and the alignment sheet came back good. So I’m lost I have no idea why it’s wearing so badly. Anyone have ideas?

[cfm56d7b]

How many miles did your vehicle generate since H&R Super Sports springs were installed?

My humble thoughts without knowing more about the vehicle.

Although wheel alignment came back within specifications, the problem might be negative camber being introduced during certain driving conditions. This will cause inner tire wear.

The question is of course why.

One possibility: the rear springs are compressing to such an extent that negative camber is in fact being introduced.

Again - what's the condition of rear springs? Did you buy them new or used?

[Justin_F32]

Originally Posted by cfm56d7b

How many miles did your vehicle generate since H&R Super Sports springs were installed?

My humble thoughts without knowing more about the vehicle.

Although wheel alignment came back within specifications, the problem might be negative camber being introduced during certain driving conditions. This will cause inner tire wear.

The question is of course why.

One possibility: the rear springs are compressing to such an extent that negative camber is in fact being introduced.

Again - what's the condition of rear springs? Did you buy them new or used?

Originally Posted by cfm56d7b

How many miles did your vehicle generate since H&R Super Sports springs were installed?

My humble thoughts without knowing more about the vehicle.

Although wheel alignment came back within specifications, the problem might be negative camber being introduced during certain driving conditions. This will cause inner tire wear.

The question is of course why.

One possibility: the rear springs are compressing to such an extent that negative camber is in fact being introduced.

Again - what's the condition of rear springs? Did you buy them new or used?

The springs came with the car when I bought it. it wears way too much this is is about to be my 3rd time changing tires this year, and I don't even drive the car often. As to when the the springs were installed I have no idea

[cfm56d7b]

I suspect rear springs are either worn out or defective. Good independent shop can inspect the rear suspension and provide more insight.

[kern417]

What were your alignment specs? And how much inner wear over how many miles are we talking? Worn springs won't matter if the alignment is good. I have 2.5* of camber in the rear and the tires are wearing pretty evenly. I think with My Super sport springs I was around 1.8 in the rear. But I also like to drive the car hard and take turns at speed. If 90% of your driving is cruising on the highway then your camber is working against you.

[Justin_F32]

Originally Posted by kern417

What were your alignment specs? And how much inner wear over how many miles are we talking? Worn springs won't matter if the alignment is good. I have 2.5* of camber in the rear and the tires are wearing pretty evenly. I think with My Super sport springs I was around 1.8 in the rear. But I also like to drive the car hard and take turns at speed. If 90% of your driving is cruising on the highway then your camber is working against you.

[IMG][/IMG] took it in for another alignment let's see what the specs look like

[Justin_F32]

Originally Posted by Justin_F32

[IMG][/IMG] took it in for another alignment let's see what the specs look like

The rear seems to be in spec

[MacklinUSOB]

Originally Posted by Justin_F32

The rear seems to be in spec

I would check on your rear trailing arm bushings. While static on the rack you have consistent (enough) numbers between sides but under changing loads/compression it will be a different story. I run -2.4 in the rear and mine wear pretty evenly but I don't do a lot of highway miles. Toe can change dynamically along with the camber with bad RTABs which can really accelerate the wear.

[kern417]

Yeah potentially either your driving style or a bushing. You can jack it up and see if the wheel has any play when you try to move it around. That'll indicate there's a bushing/bearing issue.

It also looks like you have stretched tires. 20s + small stretched sidewall + camber means you're likely to roll over onto the sidewall and put a lot more load on the edge of the tire. What are your wheel/tire specs?

[LaNcE01]

So if you are 95% highway (which i am) how do you fix this? Im on my 2nd set in less than 9 months!

[kern417]

Originally Posted by LaNcE01

So if you are 95% highway (which i am) how do you fix this? Im on my 2nd set in less than 9 months!

reduce your rear camber.

[Watsey]

My rear geo is

Camber -1º25' each side
Total toe 0º17'
Thrust angle 0º

Tyres are run at 2.4 Bar and wear is pretty much even across the treads.

These current tyres, Michelin Pilot Sport 4S, have done around 20K miles including 6 track evening sessions and a full day track session at Spa (Belgium) where they did around 150 hard track miles, and still have ~4mm remaining (i.e. ~50% worn)..

Is there a reason why you're running more camber at the rear than the front ?
Definitely check all bushes for wear - if there's wear in the system the geo can change when the car is moving.
What tyre pressure are you running ?
What wheel and tyre sizes are you running ? Are the tyres run-flat ? RFTs, especially on 19s, have a rep for inner shoulder wear especially with incorrect inflation and/or >OEM camber.

[kern417]

Originally Posted by Watsey

My rear geo is

Camber -1º25' each side
Total toe 0º17'
Thrust angle 0º

Tyres are run at 2.4 Bar and wear is pretty much even across the treads.

These current tyres, Michelin Pilot Sport 4S, have done around 20K miles including 6 track evening sessions and a full day track session at Spa (Belgium) where they did around 150 hard track miles, and still have ~4mm remaining (i.e. ~50% worn)..

Is there a reason why you're running more camber at the rear than the front ?
Definitely check all bushes for wear - if there's wear in the system the geo can change when the car is moving.
What tyre pressure are you running ?
What wheel and tyre sizes are you running ? Are the tyres run-flat ? RFTs, especially on 19s, have a rep for inner shoulder wear especially with incorrect inflation and/or >OEM camber.

with supersport springs you're going to have some camber in the rear. That's just the nature of our suspension, we gain a lot of camber when lowering the car. I think on mine I was able to reduce it to -1.8 but that was it.