he Bear 8mm Spaceballs Ceramic Bearings are here to ease your life: These bearings are made with low production tolerances to provide precision and durability. Additionally, the Spaceballs come with integrated spacers and speedrings! No need to hunt for bits and pieces anymore! Just put them into your wheels and enjoy the ride. Additionally, these bearings feature ceramic balls that increase their top speed and are much more durable when it comes to wet and dirty riding.