The SRAM DUB BB386 bottom bracket was developed to complement SRAM DUB cranksets. The SRAM DUB BB386 bottom bracket bearings have an inner diameter of 29mm and are designed to bridge the gap between 24mm and 30mm axles. By allowing SRAM to fully focus on this new standard, stiffness and durability are significantly improved. This achieves an even better relationship between chainrings, cranksets, crank arms, and bottom brackets. Ceramic bearings Frame width: 86.5 mm Frame diameter: 46 mm Selection aid View this handy table to quickly determine the correct bottom bracket per frame type and link directly to the correct item in Accentry.Sram Article number: 730130 EAN code: 710845878282 Supplier number: 00.6418.018.011 Retail packaging: Yes