Made with a blacklight-reactive urethane on a signature Claus Grabke pro model, Slime Balls welcomes the Exploding Clock neon yellow Light Ups cruiser wheels in a 60mm diameter and a soft 78a durometer - with bright LED lights hidden inside. Arriving with replaceable Bronson G2 bearings already inserted, the LED lights are powered by rotations - so you never have to charge batteries to shine bright on the streets. The uniquely futuristic wheels are finished with classic graphics from the late 80's, honoring Claus Grabke with his moniker and pro graphic printed on the sidewalls.