Mission American Sealed Bottom Bracket Size:Fits 19mm Spindle but with an all-around smoother

but with an all-around smoother tread for more grip and sidewalls that sit further around the side of the tire wall for better grind performance

Includes internal spacer and additional crank arm spacers

Protected by US Patent 9

Made in the USA from CNC'd 6061aluminum with laser-etched graphics

STYLE Mid BRAKE MOUNTS Thread-On (sold separately) DROPOUTS 14mm SEAT POST SIZE 1" / 25

Mission American Sealed Bottom Bracket Size:Fits 19mm Spindle but with an all-around smootherDesigned specifically to work with 3 piece sealed cranks on frames utilizing an American bottom bracket shell. Includes 2 precision sealed bearings, aluminum cups, high density plastic cone spacers, center tube spacer, sprocket adapter, and plenty of adjustment washers.