My Toyota 4Runner had a horrible vibration so I took it to Discount Tire for a Road Force Balance, vibration remained and they told me it was the tires. Brought it to GT where I have my regular service done and they did the Road Force Balance the correct way, (actually removing the tires from the wheels during the balance). Shake in the steering wheel/vibration above 55 mph completely gone, drives like a dream. Glad to find a local shop with fair prices and quality service. Better service than the dealership and chain stores in my experience.