Red lights, stop signs, blind intersections, and clueless drivers constantly test your fast-twitch muscles — you need your bike to respond as fast as you do. Our ultra-stiff steel BSA track bottom bracket will respond to whatever wattage you stomp out, whether it\'s fleeing sirens or preparing for the bell lap. The BSA track bottom bracket is the yes component to Is that compatible with my track frame? Features: Versions: Track BSA steel - 119g Characteristics: Designed to work with BSA threaded bottom brackets and ROTOR track cranksets Machined steel cups