Slime Balls 60mm, 78a Gator Swamp Spew Light Ups OG Slime in transparent yellow with neon graphics.<br /><br />Slime Balls Light Ups wheels feature LED lights that light up when you roll, powered by the rotation of the special wheel spacer and wheel core. No batteries required. Light Ups come with removable / replaceable Bronson Speed Co. G2 bearings. <br /><br />Slimeballs OG Slime shape is a versatile, symmetrical center bearing cruiser wheel with soft, 78a urethane. <br /><br />*Special spacers are included and required, axle nuts may need to be tightened fully for proper light ups operation.