Technical specificationsItem: 38YM1/48Y1Type: Taper Roller Bearing Steering bearings for motorcycleLubrication: Need GreaseDimensions: 30 x 48 x 12 mmID (inner diameter)/Bore: 30 mmOD (outer diameter): 48 mmWidth/Height/thickness: 12 mmQuantity: 1 PcsWeight: 78 g