FEATURES:Our American BB cups allow you to use any sealed MID BB (19, 22 or 24mm) in any American bottom bracket frame. If you have a frame with an American BB shell,Buy a MID BB like ourSavageorRevolver, press the bearings into the cups and the cups into your frame.If you are upgrading from a loose ball system you will also need this8-Spline spindle.

MATERIAL:6061 T-6 Aluminum Alloy
BEARINGSIZE:MID
BB SHELL SIZE:American
COLOR:Anodized Black
WEIGHT:2.0 oz. (56.7g.)