FYH Bearing UCP311 55mm Pillow Block Mounted Bearing bore 30 the NU215 outer diameter is

the NU215 outer diameter is 130mm

IKO: LBE 20 UU

S608-2RS Sealed Ceramic Skateboard Bearing - ABEC-5

Drop it in and feel the difference

NSK: MR8012ZZS

FYH Bearing UCP311 55mm Pillow Block Mounted Bearing bore 30 the NU215 outer diameter isUCP311 FYH Bearing Pillow Block Bearing Cylindrical bore (with set screws) 55mm Inner Diameter This is the most common type of mounted ball unit. The rib at the bottom of the housing mounting section provides for a robust unit that can withstand great loads from any direction. Mounted units with cast steel housings are also available in this series, and are used for applications with severe loading and shock load conditions. Tapered bore style units