Mallz

They would have originally looked like this. So whatever you want to call them.

Hi all, Just encountered this issue today, was driving down the road and felt like something was up with the tires as the truck was vibrating strangely. So we pulled over to check on them and my husband went to tighten the lug nuts and had 2 of them snap in half with barely any pressure applied. Not the stud mind you, but the actual lug nuts. They're aftermarket so only the tops broke off, part is still on the stud holding the wheel on. What could cause this?