As title states, my girlfriends car has severe tyre wear on the outside edge of only the passenger rear tyre, I don't know what could be causing this but the last 2 tyre changes and the same thing has happened to the same spot of the same corner.
Car is tracking perfectly straight, tyre pressures are checked and corrected regularly and are never 2-3 psi from where they should be.
Haven't really checked it out just yet, by I'm guessing suspension defects, could bad shocks and/or coil springs cause this kind of wear? Or maybe a trailing arm?
Car is a 2010 Suzuku Alto SZ4.
Here's what it looks like
No pic attached
Shock absorber on that side looks like it's leaking a lot, could that be the cause?
Pic wouldn't attach, took another of the shock absorber and it did attach above. Could this be why tyre is facked?
You say its tracking straight but have you any results from a 4 wheel alignment? The wheel could be toed in or have positive camber
Used to happen on our Renault Modus.
One lad said it was Roundabouts.
The tyres were narrow enough for a tall car like it
The picture is not related by the issue, only leaking strut, rust and something more leaking. If something does not rubbing the tyre (like liner) then you need wheel alignment. Why tyre shop did not address the issue for you? or you just ignored their sales pitch? Look closer the entire rear passenger side suspension. If something need to replacement, it is right thing to do before alignment.
Don't have any printed results but it was 4 wheel aligned at the last tyre change and all was good
There's plenty Of clearance nothing is rubbing the tyre outside edge. The worn shock definitely couldn't be causing it??
Tyres are quite narrow and car is small but narrow and tall aswell. She takes corners fast enough but would that not cause other Tyres to wear also? Other 3 corners are perfect.
If it was due to a roundabout I would expect the wear to be on the front left not the rear - unless she does drifting around the roundabouts in her Suzuki Alto. Should be very little wear on the rear of one of those things, so something is obviously wrong if it is wearing incorrectly - so get a mechanic to check the suspension at that corner and then do an alignment.
Would be good to see a photo of it though.
Just a thought if it is evenly worn around the circumference then it's likely that something in the suspension is bent - it's a fairly simple setup at the back of the Alto so has she whacked a kerb/pothole or anything like that?
A worn out damper (which is what it really is - the spring is the shock absorber 😁) wouldn't cause a regular wear pattern all around - it'd be high/low spots.
A pic would help.
I'll try to upload another pic of the tyre later this afternoon, it's evenly worn around the outside edge, just looks like a bald tyre on the outside edge all around it.
She hasn't hit off anything. I had a quick look underneath yesterday everything looks fine except for that leaking damper but I don't want to be changing things and guesswork
Here's the photo, there should be 4 lines of tread.
This is alignment problem. Like I said before, look carefully the rest of the suspension before alignment. Remember, that car is is currently very dangerous and do not go to highway.
It could be an alignment problem, after researching it, it does seem like a knackered shock absorber can throw out the alignment and you could end up with uneven wear like in the photo. I think I'll change the shocks, tyre, and get another 4 wheel alignment done for her, and watch that tyre again after its had some wear to check if its even.
Typically if something fails on suspension, around that area can many suspension parts fail prematurely.
That wear looks to severe to be just the shock.
Something bent or broken is my guess.
If you stand back and look at the car from the rear does the wheel look off camber wise?
My guess is that it's been wearing for a long time that's why it's so bad, I've looked at the car from behind lying down on my stomach and left and right side look identical to the naked eye, also looked down the car from the roof through the tyre and camber looks the same left and right sides, again to the naked eye but nothing looks off to me, I may lift the car at the back, remove both wheels and compare to further investigate. I'm lost really.
Jack it up and at least give the wheel a good wiggle to see if you have any play in bearings etc.
I see no feathering on the tyre so i think more camber than tracking.