One Piece Bottom Brackets
The One-Piece Bottom Bracket is otherwise known as the American Bottom Bracket. It is the traditional BMX bottom bracket system, compatible with One-Piece Cranks.

Truvativ BB Adaptor American to Euro
+
81190
!
You can easily convert your BMX frame with the traditional American or One-Piece bottom bracket shell to take Euro (otherwise known as standard) bottom brackets.

Press these into your frame, secure with the attached bolts, and screw in your Euro bottom bracket!

Weight: 118g.

YST BB Set OPC
+
81101
!
Standard bottom bracket set for one-piece cranks and also for various 3-piece crank sets.
Right hand thread on right hand cone, left hand thread on left hand cone. Press-fit cups into large diameter bottom bracket shell. The bottom bracket shell is the traditional "American" bottom bracket, and has an outside diameter of approximately 56mm. (Will vary slightly between frames as it's the inside diameter that's constant.) Cone threads: 24tpi. Weight: 292g.