Soldato
Its a Mysterae to me? 
What would cause this type of tyre wear?
- Thread starter Mysterae_
- Start date
Soldato
Just had another look and noticed how far the tyre hangs over the the inner alloy wall.
I might be wrong but I'm thinking 2 things:
1. Wrong alloys for the car and the offset isn't right
2. Wrong size tyre and it's too wide for the wheel.
I'm still going with the damage being caused by suspension rubbing, the wear is too uniform not to be.
Its a Mysterae to me?
I see what you did there
.I'll post the findings of the alignment check once it's done next week, earliest I could get.
Associate
I thought the same as you straight away from the images. A tyre that is too wide for the wheel or incorrect offset causing rubbing on a suspension component.
It's neither of the two listed above and I'm checking the suspension. I've had this car for over 7 years and it was roughly 18 months old (roughly) at that time. It had the factory run flats when I got it and I replaced them soon as I could, so probably had 3 tyre changes since then. It's never shown this type of wear before.
The wheels are stock BMW and the sizes are:
Front - 245/35ZR20 8.5J ET33
Rear - 275/30ZR20 9J ET44
Remember I mentioned a vibration from the day these Yokohama's were fitted and the numerous attempts by the garage to fix it, which they failed. Even BMW couldn't find an issue when I took it to them. So either I was sold a duff tyre or they messed up the alignment so badly to cause this.
One thing to note - I have changed wheel sizes and tyres in the last week and there's no vibration at all, not even a hint. Perhaps a buckled or bent wheel? Time to get out my dial gauge and check that.
Soldato
Yup.
This can happen on the Fiat 500 lol. It just shows how overpriced VAG/BMW cars are now. They used to be robust back in the day.
Over time they start to sag at the rear and the alignment changes, but cannot be adjusted back to where it should be.
subsequently clocked this video - guess he singled out bmw as click bait -
but shows how suspension bushing can well be the cause causing erratic toe.
WHY BMW TIRES WEARING ON THE INSIDE
but shows how suspension bushing can well be the cause causing erratic toe.
WHY BMW TIRES WEARING ON THE INSIDE
Soldato
Cheers for that @jpaul, very informative! Obviously hoping it's an alignment issue rather than a bushing. I'll let you know next week what was found.
Associate
Wow, I am actually surprised that a worn bush could cause a wear pattern that extreme but I've learnt something new, which is a good thing. Especially as I'm toying with getting a BMW touring as my next car.
Associate
Suspension issue. Worn bush won’t be found on alignment check, but will allow a control arm to move when driven and put the tracking out
They're also absolutely horrible on daily drivers.
Not really, only if you get really hard ones.
Associate
You should see marks on suspension component where the tyre has been rubbing
Soldato
Sorry, might have missed it, but what BMW is it?
The solid rubber bushes on the suspension arms are normally very robust, and again, i'd be willing to bet this is a toe issue. Will be interested to see what the alignment "before" report shows when you get it done.
This won't be an underinflation issue as you normally have to be significantly underinflated (20%+) to cause issues and it normally causes slight wear on both the inner and outer shoulders. Your tyre has just worn away on the inside edge so much that the tyre has blown out and the tread has delaminated from the sidewall.
The solid rubber bushes on the suspension arms are normally very robust, and again, i'd be willing to bet this is a toe issue. Will be interested to see what the alignment "before" report shows when you get it done.
This won't be an underinflation issue as you normally have to be significantly underinflated (20%+) to cause issues and it normally causes slight wear on both the inner and outer shoulders. Your tyre has just worn away on the inside edge so much that the tyre has blown out and the tread has delaminated from the sidewall.