Rear camber way off at stock ride height?

[Stinger-Performance]

My Stinger has about 27k miles on it. While rotating the tires today I noticed the rear is eating the inside edge very bad. After the car was back down on the ground, I can visibly tell the camber is off. I've not yet rigged up a way to measure camber at home but I will soon.

When searching I find people talking about rear camber adjustment on lowered cars (which makes sense) but has anyone had issues with a stock ride height/stock springs Stinger having rear camber issues? I could understand it if it if the car was 10 years old and had a bunch of mileage with sagging springs but 27k miles is nothing for suspension components. I've attached three pics showing the inside, outside, and whole width of the tire.

 

[Stinger GT SS]

Get a wheel alignment done, it may confirm your concerns & have it adjusted it accordingly.

 

[MerlintheMad]

My stock car eats away at the outer edges, front worse than the rear; LF tire outer edge worst of all.

 

[Stinger-Performance]

Mine eats the outer fronts as well but I attribute that to aggressive cornering, clover leaf ramps at high speeds, etc. I guess I'll rig up a way to measure camber tonight just to confirm my suspicions. I KNOW it was not like this when new which is why it's even more confusing.

 

[andybob]

My Stinger has about 27k miles on it. While rotating the tires today I noticed the rear is eating the inside edge very bad. After the car was back down on the ground, I can visibly tell the camber is off. I've not yet rigged up a way to measure camber at home but I will soon.

When searching I find people talking about rear camber adjustment on lowered cars (which makes sense) but has anyone had issues with a stock ride height/stock springs Stinger having rear camber issues? I could understand it if it if the car was 10 years old and had a bunch of mileage with sagging springs but 27k miles is nothing for suspension components. I've attached three pics showing the inside, outside, and whole width of the tire.
View attachment 68306

Inside edge like that is a toe issue. If the camber was extreme enough to wear a tire like that, it would be very noticeable (in excess of -10° of camber IMO).

I was always taught inside edge worn = too much toe out and outside edge warn = too much toe in.

I have not measured it, but stock camber appears to be about -1° to -1.5°‘s in the rear of my 22 GT-Line AWD.

I would suggest getting an alignment and checking your rear bushings for any abnormal wear.

Edit, found this that might help:

http://www.kstinger.com/alignment-570.html

 

[Stinger-Performance]

It certainly could have a toe issue as well. It visibly has a camber issue as well. Toe can be checked with a tape measure so I'll do that while I'm measuring camber later.

I found that link when I was searching about this issue previously.

 

[Stinger-Performance]

Camber measures (with my DIY method) at 2.9 degrees, about double what it should be but not so far off that it should wear the tires like these are.

It is also toe out about 0.125" (which calculates to about -0.25 degrees if my math is correct). So it's toe out about as far as it should be toe in. Either way, this isn't a huge amount and not nearly what I'd expect to see for this type of tire wear.

I'm tempted to load the hatch with some weight (simulating some road trips we've went on with a full hatch) to see what that does to alignment. These road trips are probably only 10% of the total miles driven though so I wouldn't expect all of this wear from a few thousand miles of loaded travel.

Either way, I'll get it aligned in the next few days and see what their measurements say. My confidence is not very high that it will fix the tire wear issue though unless their measurements show much more camber and toe than my measurements show. I've bought new wheels and tires (not yet installed, summer use only) so I certainly need to get it figured out before those high dollar tires get installed.

 

[Stinger-Performance]

Test results for a new car driven 90% highway miles for 27k miles:

Front Toe: 0.42 deg toe out
Rear Toe: 0.11 deg toe out

Front Camber:
Within spec

Rear Camber:
Left -2.4 deg
Right -2.7 deg

So it appears the inside edge tire wear was a combination of both the front and rear were toe out, plus the rear had almost twice as much camber as it should.

 

[SIMONGUEY]

getting a wheel alignment soon. front tires look perfect but my rears are getting destroyed in the middle. worth just replacing the back tires or all? two tops have mean life left.

 

[Stinger-Performance]

Middle wear is over-inflation (too much air pressure).

 

[SIMONGUEY]

Middle wear is over-inflation (too much air pressure).

oh rip i be keeping these bad boys at 40psi

 

[Stinger-Performance]

I think the door tag says 36psi. Now that they are worn in the middle, I'd probably put them near the minimum before the "low pressure" warning comes on (32psi?) to try to force the outer edges to wear more than the middle.

 

[SIMONGUEY]

I think the door tag says 36psi. Now that they are worn in the middle, I'd probably put them near the minimum before the "low pressure" warning comes on (32psi?) to try to force the outer edges to wear more than the middle.

damn, I will give the sticker a look! the main reason why I have them at 40-41 is that the shop I went to left it at that when I replaced my rims to 20" and tires.

 

[Stinger-Performance]

Yeah, well you now have plenty of evidence that it's too much pressure, at least on the rear.

 

[SRV]

oh rip i be keeping these bad boys at 40psi

As already stated, that pressure is much too high, stock pressure is 38F and 36R for 19's.

Since you got new rims/tires, go to this site and calculate what the new tire pressures should be:

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

 

[SIMONGUEY]

As already stated, that pressure is much too high, stock pressure is 38F and 36R for 19's.

Since you got new rims/tires, go to this site and calculate what the new tire pressures should be:

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

mannnnnnn... lol.. all i know about my wheels is the fact that they're 20" lol. i will give them a look soon

 

[SRV]

mannnnnnn... lol.. all i know about my wheels is the fact that they're 20" lol. i will give them a look soon

In the meantime then, put the fronts and rears to stock psi - 38F, 36R.

 

[SIMONGUEY]

In the meantime then, put the fronts and rears to stock psi - 38F, 36R.

man and i thought that was low lol

 

[propel]

I’m having a similar issue, every time I get my car aligned it goes back to a rear camber of ~3° And has been wearing the inside of my rear tires very disproportionately to the front. I have 33k miles and have already gone through 2 tires from blowouts from this wear and am not sure what the cause is.

 

[RogueIV]

Test results for a new car driven 90% highway miles for 27k miles:

Front Toe: 0.42 deg toe out
Rear Toe: 0.11 deg toe out

Front Camber:
Within spec

Rear Camber:
Left -2.4 deg
Right -2.7 deg

So it appears the inside edge tire wear was a combination of both the front and rear were toe out, plus the rear had almost twice as much camber as it should.

Just an FYI:

Rear toe out will make the car more unstable at speed as the rear will want to wander. There isn't many times where one would ever want rear toe out as it's often too unpredictable.
Rear toe in increases stability, predictability, and rear traction
Zero or slight toe in is generally recommended for most cars

Front toe out can help with with grip and steering response while entering a turn but can cause the car to wander especially under heavy braking.
Front toe In will do the opposite, increasing straight line stability at the cost of slower steering response and less front end grip and corner entry. Almost every OEM will recommend slight toe in.