Review on Oldboy Premium Ceramic Skateboard Bearings (608RS ZrO2 at 8 x 22 x 7 mm) - Perfect for Longboards, Quad Skates, Rollerblades, and Scooters! by Jason Rogness

Noticeably softer at first but after washing and greasing my Zealous Greens they are almost even. Mine also had a very disgusting noise similar to when bearings fail. They make a noise when they spin freely, but they still spin very well, even when they were new. Overall I don't regret the purchase. I wish they had rear guard as they get dirt sometimes. I thought it would be a cost saving method. I was tempted to buy again but I'm not entirely sure. At first there was a stark difference in performance, but that difference got worse pretty quickly. I washed them and rubbed them with bone cream a few days ago and they were great for a while but then went back to normal. I thought I had checked them out before, but they seem to have disappeared.