I30 pulls to the left after balancing

[Zoltan11]

After rotating my tires for the first time I noticed a high speed vibration in the steering wheel. I had all four wheel sets road force balanced. Vibration was still present but better. But now my I30 has a pull to the left which it didn't have before. I had new bc coilovers installed 10k ago and had perfect alignment since then. Im wondering why my car pulls left now. I noticed the tire guys put my tires back in the wrong corners. So I swapped the front wheels side to side and it still pulls left same as before.
Anybody got any suggestions? Did Discount lift my car improperly?

[audtatious]

I doubt it was a lift issue but you can never tell. I would have the alignment checked at this point if you don't see any other issues.

[Zoltan11]

I rotated my tires front to back and the vibration and left pull are gone. So now I have a new tire on the front right and a 10k tire on the front left and 10k tires in the back.
Here is what I think happened... The tire guys put the right front and rear tires on the front after balancing, and the left side tires on the rear. I think having two front tires that have spent their whole life so far on the right side made it pull left. Maybe thats why switchin the fronts side to side did not change the vibrating or left pull. And the vibration is either a bad tire or not good enough balancing. Now that the vibrating tire is in the rear I can't feel it.

[audtatious]

Good deal.

The tire issue could be a twisted belt as well. As long as it's working OK now I would not worry about it until the next balance.