Featuresdiameter 63mmwidth 381mmcontact patch 318mmcore standardsold as a pack of 4 bearings sold separatelymaterialsdurometer 83a polyurethanemake a bigger impact on a smaller scale with the micro motion longboard wheels from metro sizing up at 63mm the micro motion brings metro39s most popular wheel to an even bigger audience set the wheels in motion by making sure to pick up a pack today