WELDTITE Packed Caged Hardened Steel Ball Bearings Races Available in 2 options: 1/4 caged bearings for traditional cupped bottom brackets (CAGE I.D 19mm - O.D 29mm) Supplied with grease 5/16 caged bearings for 1 piece cranked BMX & MTB bottom brackets (CAGE I.D 32mm - O.D 44.5mm) Supplied with grease [this bottom bracket is often referred to as American Sized Bottom Bracket] PLEASE REMEMBER WHEN FITTING CAGED BALL BEARINGS THE BEARINGS FACE INTO THE CUPS NOT THE CAGE.
