Bicycle bottom bracket ball bearings with retainer - 5/16" X 12
Bottom bracket bearings in a retainer. This size is typically for American bottom brackets for one piece cranks.
* 5/16" carbon steel ball bearings
* Bearing retainer holds 12 bearings
* 44mm outer diameter / 31.4mm inner diameter retainer
* Great to restore an original bottom bracket that has pitted or worn bearings