Theory 19mm American Bottom Bracket Kit - Purple 28tpi OPC Increased thickness in the side

Increased thickness in the side wall areas helps to prevent flats

PopSockets are repositionable and will stick to most devices and cases (but may not stick to silicone or waterproof cases)

It is constructed of CNC'd chromoly and sounds like an angry rattlesnake stuck in a wood chipper (this may be an exaggeration

Sold as a pair

Theory 19mm American Bottom Bracket Kit - Purple 28tpi OPC Increased thickness in the sideThe Theory 19mm American BMX Bottom Bracket Kit includes anodized cups, sealed bearings, cone spacer, bottom bracket spacers, and a tube spacer. This bottom bracket will fit many popular cranks such as Profile Race, Redline Flight, Fit, and many other 19mm cranks. Color: Purple Note: This part was colored by anodizing, which is a method of coloring metal. Color differences do occur among manufacturers and even among batches from the same manufacturer.