BSA ThreadFit 30mm Bottom Bracket With 73mm Shell, Portland-Made Steel Bearings, Easy Grease Injection System For At-Home Maintenance, Optional Conversion Kit Available, Built For Quiet, Smooth Pedal Power

ThreadFit 30mm Bottom Bracket for 73mm Shells, Portland Bearings
✔️ 30mm spindle, 73mm shell, Portland-made steel bearings, silent use

This threaded bottom bracket is designed for 30mm crank arms and 73mm threaded shells, delivering quiet, smooth power in bikes that use standard threaded frames. It features Portland-made steel bearings and an integrated grease injection system for at-home maintenance.

✅ 30mm spindle compatibility
✅ 73mm threaded shell compatibility
✅ Portland-made steel bearings for durability
✅ Integrated grease injection system for at-home maintenance
✅ Optional conversion kit available

💡 What is a 30mm spindle bottom bracket used for in threaded bike frames? It's handy for upgrading to 30mm cranks while keeping the drivetrain quiet and smooth. - Supports 30mm spindle crank arms in 73mm threaded shells - Sealed Portland-made steel bearings for durability and smooth operation - Integrated grease injection system for at-home maintenance - Optional conversion kit available to adapt to other standards