Sealed cartridge bearings High flange design Spacing: 100mm frt, 120mm rear HOLLOW CORE lightweight heat-treated axle New lighter design Front hubs use 9x1 thread pitch while Rear hubs use a 10x1 axle FT 36H B/O 9mm Aly Sil RIM 100mm 62 62 15.625 15.625UPC/EAN/GTIN: 072774375431