Theory 19mm American Bottom Bracket Kit - Purple 25t Internal Rim Width: 27mmExternal Rim

Internal Rim Width: 27mmExternal Rim Width: 33mmRim Height: 15

Posted Weight: 10

Made with durable AL6061 alloy for the cap and AL7075 alloy for the bolt

It is constructed of 6069 T6 aluminum that is 30% stronger than 6061 T6

Shell Width: 68mm

Theory 19mm American Bottom Bracket Kit - Purple 25t Internal Rim Width: 27mmExternal RimThe 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.