Bottom Brackets

Rotation Engineering offers BSA threaded bottom brackets designed for all disciplines of cycling and all weather conditions. These high quality bottom brackets are offered in your choice of two widths (73mm and 68mm), three spindle diameters (30mm, 29mm, and 24mm), three bearing configurations (no contact, full contact, and ABEC-3), and four colors (clear, bronze, purple, and black). So, whatever and wherever you ride, Rotation Engineering has a configuration to suit your needs. We have you covered on the road, cross-country, and mountain in the dry, wet, and all conditions.