Good product and worth the money. Other reviews have complained that they come loose. I don't think they test different fit options to make them as tight as possible. It took me three different combinations of ring adjuster and plastic ring expander until I got the tightest fit. Pretty much any combination will work for your wheel, but it should be the best if you don't want them to come loose. One size doesn't fit all. Don't berate a good product for bad installation. I'm sure it won't fit properly for some applications.