Acros

BSA Threaded Bottom Bracket

Acros BSA Threaded Bottom Bracket is a service-friendly upgrade for riders who want the security of a threaded BSA interface with smooth, consistent bearing performance. With multiple spindle-specific options and included setup parts, it’s designed to simplify correct fit, reduce guesswork during installation, and keep the drivetrain running quietly and efficiently over the long haul.

• BSA threaded fit - Threads into standard BSA/English bottom bracket shells for a secure, straightforward install and dependable long-term retention
• Multiple crank spindle options - Available BSA configurations for SRAM DUB, Shimano HollowTech II, SRAM GXP, and 30mm spindles to match the crank the rider is actually running
• Interchangeable stainless-steel deep groove ball bearings - Designed for smooth rotation and practical serviceability when bearings eventually wear
• Included chainline spacers - Helps dial in correct spacing for the intended crank/frame setup, supporting proper chainline and shifting performance
• Included installation/maintenance grease - Reduces friction and corrosion at assembly, and supports cleaner, more consistent future service