Shameless plug. CSG aluminum lugnuts are tested through rally and track conditions. A set of 20 lugs weighed in at 13 ounces (368.5 grams), or approximately 0.04 lbs (18.4 grams) per lug nut. Weight was done by third party individual: @
Captain Insano.
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We have some ultra heavy duty lug nuts made from chromoly steel coming in for the guys who want to absolutely thrash their lug nuts to hell. They are 0.11lbs (49.9 grams) each. A sample of lug nuts were salt fog/environmentally tested to test the durability of the rust-resistant coating as well with certificate.