HIGH STRENGTH SHELL:The steel shell can absorb roundness tolerance for installing ports of Bracket Bottom.Suitable for 68mm frame shell.
BSA-INTEGRATED DESIGN: Integrated System can protect the frame, more power output, it's better than ordinary structure bottom bracket.
LONG SERVICE TIME: The bottom bracket is solid and durable with a long service time. Please use the BB tool to install and replace the bottom bracket for safety.
SMOOTH SURFACE: Fine workmanship, small dimensional error, 2 Bearings precision thread design allows him to better connect with the arm of the bike.
SEALED BEARING: Sealed cartridge bearing assembly - maintenance-free sealed cartridge keeps out dirt, mud, and water.