i am getting a jerking in my wheels when i accelerate and sometimes when i makin a turn it's like she pulls real hard not out of allignment. what could this be? i have 17' rims with 205/40 zr17 tires

 

its really possible that rutts/road imperfections are causing the car to pull or jerk from one side to the other. wide stiff tires don't like imperfections in the road, and you especially feel it with no power steering.

 

wheel bearings in good shape?

 

good point, jack up the car and shake the wheel, if there is slack (clunking) and the rotor is moving in unison with the wheel but caliper doesn't move it'd be a bad wheel bearing... That will sure make your car wander