- Attention buyers - five of these fell off while driving. The seat is too loose. Instead, all you had to do was buy new black lug nuts. The sizes of the resulting lids were inconsistent. I have 21mm nuts and some caps fit perfectly and others are very loose. While they haven't fallen, they're not seated properly either, which looks odd. When I asked the seller about the problem, he replied and offered to put a piece of paper inside so it wouldn't fall off. That seems like a terrible idea, replacing the defective product would be the right answer. I would suggest buying a different brand.