Saris Cycling Powertap SL Rear HUB Bicycle Ceramic Ball Bearing set Outer Diameter - 56mm Basic Dynamic Load Rating (Cr):

Basic Dynamic Load Rating (Cr): 21200 N

outer diameter is 220mm and width is 28mm

Dimensions: 4mm x 7mm x 2

Stainless Steel with Ceramic Balls - Lot of 10 Bearings - VXB Bearings

Saris Cycling Powertap SL Rear HUB Bicycle Ceramic Ball Bearing set Outer Diameter - 56mm Basic Dynamic Load Rating (Cr):Hybrid Ceramic Deep Groove ball Bearings (steel rings with ceramic balls) Fits Saris Cycling Powertap SL Rear HUB Bicycle Closures: Rubber Sealed Closure Side: Double Sided Seals Lubrication: Low Friction Grease Material: Corrosion Resistant Chrome Steel Balls: Low Friction Solid Ultra Light Ceramic Balls Brand: VXB Quantity: Set of 4 Bearings Location : Rear Hub