Description Set of 2 double sealed 6004-2RS series scooter and ATV bearings. These bearings are used in a variety of applications including in wheels, transmissions, gearboxes, and various other GY6/QMB139 engine components. The 6004-2RS series, sometimes referred to as 6004RS, are single-row, deep groove ball bearings. Extra light in weight, they come with a 20 mm bore diameter. Check your existing bearings for the series number, which is usually etched into the side of the bearings. Specifications Diameter (Outer): 42 mm Diameter (Inner): 20 mm Width: 12 mm Compatibility Coleman Powersports SK100 Jonway YY50QT-3 Jonway YY50QT-5 4-Stroke Jonway YY50QT-6 4-Stroke Jonway YY50QT-10 4-Stroke Jonway YY50QT-21 4-Stroke Jonway YY50QT-28 4-Stroke Jonway YY50QT-29 Jonway YY125QT-21 Jonway YY125T Jonway YY125T-2 Jonway YY125T-2A Jonway YY125T-3 Jonway YY125T-4 Jonway YY125T-8 Jonway YY125T-10 Jonway YY125T-12 Jonway YY125T-28 Jonway YY125T-29 Jonway YY150 Jonway YY150-1 Jonway YY150-2 Jonway YY150-5 Jonway YY150T Jonway YY150T-2 Jonway YY150T-2A Jonway YY150T-3 Jonway YY150T-4 Jonway YY150T-8 Jonway YY150T-10 Jonway YY150T-12 Jonway YY150T-29 Realtree RTK100