Ceramicspeed SLT Bearings to suit Factor Raiden, 1-1/8" -> 1-13/8".Supplied individuallyOPTIONSUpper Bearing, Lower BearingSold IndividuallySPECIFICATIONSUpper Bearing: 30.15 x 41 x 6.5 | 36/45°Lower Bearing: 37 x 48.9 x 5.5 | 36/45°