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The Toyota Matrix has a lug nut that is M12 X1.50 with a 21mm hex size. The first number, M12, indicates the thread pitch, while the second number, 1.5 inches, represents the length of the thread. The 21mm size socket is required to remove and install the lug nuts. It is recommended to use an impact gun for removing the lug nuts as it can effectively break the torque compared to a standard ratchet. However, it is advised not to use an impact gun when reinstalling the lug nuts as it may overtighten them, potentially damaging the threads or wheel studs. Always use a calibrated torque wrench for reinstalling the lug nuts.
The recommended lug nut specifications for a Toyota Matrix are as follows: Thread size is M12 x 1.5, hex size is 3/4 inches, and the overall length is 1.45 inches.