External English (BSA) threaded bottom bracket for 73mm shells. We use only Enduro bearings and silicone seals for the most durable and smoothest bottom brackets available. Fully serviceable.

Includes:

• (2) – Enduro Silicone dust seals
• (1) – 2.5mm aluminum BB cup spacers for use with 68mm wide BB shell
• (1) – 1.8mm aluminum BB cup spacers for use with 68mm wide BB shell
• (1) – 0.7mm aluminum BB cup spacers for use with 68mm wide BB shell
• (2) – 0.5mm crank spindle spacers
• (2) – 1.0mm crank spindle spacers

Direct replacement for Shimano HollowTech II bottom brackets!