[matty088]

Car has 25k with original rims and tires. I have been noticing an increase in the amount of road noise I am hearing in the cabin. There is a sliGht harmonic hum that I am noticing. Very slight but it annoys me. It seems to only occur at speeds less that 35mph. I can go 120 and there is no noise. It's just when going slow. It seems to change the slower I go. Like it winds down with speed. There is absolutely no shaking or vibrating in the steering wheel or car. I d really say it seems like there is a rock stuck in the the tire tread but I inspected it and found nothing. Any ideas? By the way car is 2008 coupe 335i.
I didn't see a bubble in the sidewall..would also think a bubble would probably effect the ride....ie cause steering wheel to svibrate .
Tks in advance!

[Pokerpot]

How much tread do you have left on your run-flats?

[ModBargains.com]

You may want to have the dealership chek out your hub bearings. It's a fairly common thing and should be covered under warranty!

[hankcah]

First thing that come to mind is the tires. Do you need new ones?

Just take it to the dealership since you have 25k miles...

Let us know what it is...

[matty088]

They said its normal from tires. But I don't think that's true. But what do I know. This isn't pure road noise. It's a wha wha wha wha noise that's audible from 35 down to 0. And it varies with speed. It basically sounds like a flat spot in the tire. But we don't see a bubble. Any thoughts? They said the bearings are fine. There is no vibration in the steering wheel at speed. I am going to get non rft tires when the time comes. Which ones ?
On side note I was very impressed with the customer service at BMW of bridgeport ct. Night and day diff from prestige in nj. That place is a nightmare.

[matty088]

Originally Posted by hankcah

First thing that come to mind is the tires. Do you need new ones?

Just take it to the dealership since you have 25k miles...

Let us know what it is...

Three are new one is original. How long do these run flats last?