SHIS upper IS42mm/28.6mm & lower IS52mm/40mm

Top Bearing Size: 42mm Outside Diameter, 28.6mm (1 1/8) Inside Diameter

Bottom Bearing: 52mm Outside Diameter, 40mm (1.5) Inside Diameter

Cartridge Bearings

Includes Star nut and top cap & split style 1.5 crown race

Will suit BMX race bikes with tapered headtube