When i reduce the speed specially if i'm already stopping the steering wheels shakes, I almost feel like the tires r too, but don't know. anyone had this before?

 

"Warped" rotors, especially if it ONLY does it while braking.

 

x2 for "warped" rotors.
Wheels may need to be balanced as well. Not expensive

 

Whats a warped rotor? does it need replacing?

 

Usually a "warped" rotor is really just uneven friction properties around the surface. It's usually caused by braking hard & coming to a stop, then holding the brakes clamped hard on a very hot rotor. Unfortunately you can't avoid doing that in some traffic.

Usually can be fixed by resurfacing the rotors, occasionally you can fix it by doing a "bedding-in" procedure. Like this...

Find someplace you can do this without being stupid in traffic.
Brake hard from 40 to 10. DO NOT COMPLETELY STOP.
Drive a couple minutes to cool them off.
Repeat 4 or 5 times.

Brake REAL REAL HARD from 50 or 60 to 10. DO NOT COMPLETELY STOP.
Drive around 8 or 10 minutes to cool them off.
Repeat about 8 times.

You should do this procedure whenever you put on new or resurfaced rotors or pads. After you do this, they seem to tolerate clamping on a hot brake better.