[sixer]

To cut a long story short I have bought a brand new F11 back in September of last year. I have had the car for just over 6 months. I had the summer tyres that came with the car on for a month, then switched to brand new winter tyres. I have come to take them off today and was horrified to see a channel of very strange wear on all four tyres. This is after only 6000 miles on brand new winter tyres!
[IMG][/IMG]

Does anyone know what is causing this?

I have a strange ticking noise when turning right but it is so minor I have ignored it until now. I thought the wear may be down to front tyre pressures causing some of the suspension arm to rub but then I cannot explain why this also happens at the back tyres??

Help!

I don't want to take this to the dealer yet as I will likely get fobbed off as there is only very minor wear on the summers that I have just put back on.

[remmib]

Weirdest tire wear I've seen. are all 4 like this?

[lsturbointeg]

If it's just one tire imma go with manufacturer defect. Really... I can't think of how it can do that?

[sixer]

Its all four tyres with various degrees of deepness in the damage. The fronts are the worst with approx. 2-3mm worn down.

A theory - If the car tyres were underinflated and the car had significant load i.e 5 people, a tank of fuel and some luggage, could the upper suspension arm be causing it? This would only effect the fronts though.....

[HighlandPete]

Originally Posted by sixer

Its all four tyres with various degrees of deepness in the damage. The fronts are the worst with approx. 2-3mm worn down.

A theory - If the car tyres were underinflated and the car had significant load i.e 5 people, a tank of fuel and some luggage, could the upper suspension arm be causing it? This would only effect the fronts though.....

As I've mentioned over on the BMWLand forum, there is nothing to touch, tyre pressure variation doesn't cause interference.

Pressure could be involved, as can a manufacturing issue.

Very unusual, as if it is a softer compound around the middle of the tyre.

HighlandPete

[Noggie]

This made me go check mine as I took mine off a few days ago.
I also have an F11.
My tires are fine, no uneven wear at all.
The upper suspension arm is partly over the tire, but not far enough to make a mark where yours are.
In the rear there is nothing that can touch.

It may be pressure related, what pressure did you run?

[mko9]

I have no idea what can be causing it, but can you take a picture in profile of the top of the tire so you can see just how deep the channel is?

[sixer]

Thanks for your responses. The profile of the tyre shows 2-3 mm of channel. This is not the 7mm of tread that is left on the tyre but the unusual wear mark. I can confirm the pressures are absolutely fine (in line with BMW spec for the car) having checked them again. I have spoken to Pirelli and sent pictures. Now the summer tyres are on the car I can confirm no unusual wear on the summer tyres so it has to be the tyres. I intend to send the tyres back to Pirelli for further investigation. I would be interested to know if anyone has been through the procedure before with a tyre manufacturer and what your outcome was?