Bike Ball Crank Bearing, 4 Pack Stainless Steel Bicycle Bearings Replacement Bike Parts Repair AccessoriesSpecificationColor: SilverMaterial: MetalOuter Diameter: 20mm/0.78inchInner Diameter: 11mm/0.43inch;Ball Diameter: 20mm;Packing List: Bike Ball Crank Bearing x 4AdvantageThe Bike Ball Crank Bearing is made of 304 stainless steel with smooth balls that are rust and wear-resistant to ensure durability. Precision Replacement Mountain Bike Parts significantly reduce friction and minimize energy loss during pedal.ApplicationThis stainless steel ball-bearing is securely mounted in the cage and is specifically designed to replace crank bearings in bicycle components. It is generally used for the front axle of bicycles.Note: Apply a small amount of lubricant before installation.