90km/H-Suzuki Grand Vitara 2005 3p vibration

Hello,
I wanted to start this topic to see if you can help me solve a steering wheel vibration problem; When driving on the road on the 90km/h begins to vibrate the steering wheel, the tires are new, with 30PSI and balanced pressure, the aligned vehicle and the shock absorbers do not present a problem, there is no bearing noise (typical buzzing), I suspect that it could be the steering system .. ?? but no idea ..
the truth that I don't know what it could be .. at least it already rules out as the most obvious in my opinion ..

waiting for an excellent week
regards cordial.
Atte.
Duck.

Hello friend, it seems to be a typical wheel balance problem but if you have already balanced it controls the end of address and zipper, tell us how you fall, greetings.

Okay, thank you .. to do it I will have to carry it with a specialist mechanic, but to understand what should be done and the parts that you name me, you could explain it to me ..
in one of those if it is not so complicated and you do not require special tools, could I do it myself .. ??
Thank you in advance.

Saluido; If you really have your wheels well balanced and the direction well aligned, it could be a problem with the terminals of the direction arms, this of being in the front, you can check up the vehicle in its front part leaving the wheels suspended and through movements with the hand in a vertical and horizontal way of these, realize if they have a loose movement game ... In this way you could realize if it is any problem of terminals or roller bearings On the contrary, if it is vibration on the back, it could be double brake drum.

The vibration appears at the steering wheel at 90km/Hy increases at a higher speed, it does not disappear ..