new tires

Just got new tires on my ga, the Bridgestone Fuzion ZRi Tires.
I went by the reviews on www.1010tires.com, they were better than the michelin as ones.
Tire is nice, rides very confortably, but when I hit 120km the car starts shaking, it wasn't this bad even with the old goodyear tires.
I took it back to the tire shop, the rebalanced all wheels, but it still shaking after 120Km.
Size 225/50/16 original rims. The rims are in perfect condition.

I'm wondering if this "shaking" could be something wrong with the suspension or something.

Any suggestions???

Thanks

could be that u got a bad tire. Possibly the cords inside might be off-center. Usually if this is the case tho the car pulls one way or the other along with the vibration.

how bad is the shaking, is it in the steering wheel or the whole entire car? try taking it to a different tire shop and see what they say, mechanics in general dont like to own up to selling a bad part or service so getting the opion of a different technician might help.

It starts with only the steering wheel, around 110Km/h then around 130Km/h the entire car starts shaking.
The shop seems to think that is something wrong in the front end.