Wheel imbalance

[Zeddicus]

Good evening all

Seems I'm experiencing a small imbalance problem on one of my wheel since last tire change:
I recently went to replace my 4 run-flats with Goodyear's F1 at an indy garage. When I came in the evening to pick up the car, I was informed by the reception that the technician reported the LH FWD wheel "very difficult to balance".
I could not get any additional details since the technician in question was already gone...

I came back home trying to pay attention to any wheel shaking when I was driving, however I could not exceed 30 mph on this trip. Also the comfort of the new set of tires was just too perfect now, and soon I forgot what could have me worried before :roll:
However, few days later when I got the opportunity to push a little bit more the gas, I could distinctly hear a "rolling" sound just when reaching 50-55 mph.
Above this speed or below, the sound's fading.

Now, I know that:
- the wheel hadn't suffered any shock since I own the car (1 year)
- I hadn't this problem with previous set of Bridegeston run-flats
- Rim has a lot of small weights that proves the tech tried hard to correct the imbalance

Could it be that the shop was not qualified to work on my alloys?
Do you think I should go back to them and ask for a rebalancing or go directly to BMW?

Thanks for advice!

 

[fixit man]

If I were you I would take it back and get them to check the front ones again, it could also be a malformed tyre !

 

[Zeddicus]

I think I will go back to them to if they can give it another try.

Could it be that the rim had a defect that could not be noticed with the previous tires?
By visual check, the 4 wheels all look in pretty good condition!

I wonder also, if the wheel is beyond balancing possibility as current, is there a way to get it repaired?


Here some pictures of the balancing weights, there must be 15(!) outside and 2 inside:

 

[fixit man]

The only thing that has changed is the tyre , you didn't have balancing problems before, so to me it's either the tyres or the machine/operator !