Last week I was about 10 miles in to a ride, not heavy traffic and not high speed, about 40 to 50 mph. I started to feel a slight shake in the wheel and could feel a slight vibration in the gas pedal. This happened until I went to hit the brakes, then it was shaking very badly. Just had it inspected they after this happened, passed easily, front pads 8/32 rear were at 3/32 rotors are in good shape, all suspension parts are fine, only 50k on the car. This happens randomly not all the time but usually once or twice a day, I will be changing the rear pads today but don't think that is my issue. Any ideas?