What was found
ABORTED TAKEOFF DUE TO EXCESSIVE NOSE SHIMMY ABOVE 100 KNOTS. INSPECTED THE NOSE GEAR, TIRE PRESSURE, JACKED THE NOSE AND PERFORMED SPIN CHECK, NO VIBRATION FELT THROUGH RUDDER PEDALS AND FLAPS EXTENDED. THE VIBRATION WAS FELT ON THE 2ND TAKEOFF BETWEEN 100-135 KNOTS, AND THE 2 NOSE TIRES WERE REPLACED.