The 2013 Ford C-Max comes standard with M12 X1.50 lug nuts that have a 13/16 inch hex on them. This means that to remove or reinstall Your lugs You will need to use a socket or tire iron that is 13/16 inches. When You are removing Your lug nuts it is a good idea to use an impact driver. These can easily break the torque on the lugs and get them off the vehicle faster than using a manual ratchet. When You are reinstalling Your lugs You should always use a torque wrench though. Using an impact driver while reinstalling lug nuts can strip them out and damage Your wheel hubs since they can exert too much torque.
Tressie D
July 16, 2020
The 2013 ford c max lug nut size is 13/16"
Jeffrey Fortman
April 17, 2023
19 mm. The beauty cover on the outside of the nut warps. You need to hammer the socket on. Best to replace them with aftermarket
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