Shimano Wheel Hub Bearings Steel or Ceramic 22 Front /18 Rear loose Ball Bearing
Shimano Wheel Hub Bearings. Si3N4 Ceramic Grade 5. with screw cap. 18 balls @ 1/4" for rear wheel hubs. with or without grease. 22 balls @ 3/16" for front wheel hubs. 10g plastic tube. High grade steel.