The entry standard for Enduro bearings. Enduro\'s ABEC 3 bearings offer improved quality and performance over ABEC 1 bearings fitted by many OE manufacturers. Only the finest cycling components come standard with Enduro\'s ABEC 3 bearings. With hardened chromium steel races, balls, and tough riveted steel retainers, these bearings are durable and the perfect low cost performance upgradeBearing Code: 6904,Dimensions: 20 x 37 x 9mm,ABEC: 3 ,Grade: 10,Seals: 2RS,Grease: Mobile HP 222,Application: Hubs, Bottom Brackets,Weight: 37.20g.