The quality deep groove ball bearings of 101 Octane come from european certified suppliers with a correspondingly high quality standard. These ball bearings are universally suitable depending on the application for various uses on scooters, motorcycles or quads / ATVs. E.g. as wheel bearings, gear bearings, motor bearings or bearings for chassis and frame. Inside diameter (mm): 20 outer diameter (mm): 52 thickness / depth (mm): 12 Type: open on both sides