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Based on the information provided in the 2011 Hyundai Sonata manual, it is recommended to tighten the lug nuts to a torque range of 65.0 - 79.5 ft-lb. The Sonata has a wheel configuration of 5 X 114.3mm, meaning it requires 5 lug nuts to secure the wheels with a diameter of 114.3mm. The "MM" notation denotes millimeters, commonly used for measuring wheel bolts or nuts. The "hex" measurement refers to the top diameter of the lug nut, but when changing rims, the shaft diameter is more crucial for proper fitting. The thread size, denoted as M12 X 1.5, specifies the shaft size and the groove spacing of the threads. Additionally, it is equipped with a 21mm hex for tightening the lug nuts securely.
The recommended torque for the lug nuts on a 2011 Hyundai Sonata is 90 foot-pounds.