The first pro-model wheels of Nora Vasconcellos, the OJ Vasconcellos Cat and Mouse Insaneathane 101a Skateboard Wheels feature the ever-popular narrow conical shape with a hard edge that helps lock you in on rails, ledges, and coping. What's more, they're made from OJ's super tough and durable Insane-A-thane urethane formula for longevity that you can trust.