Shimano BB-MT501 outboard bearing bottom bracket set, English thread, 68 / 73 mm

From Shimano:

• Genuine Shimano HollowTech II bottom bracket assembly
• Set includes left and right hand cups, spacers, inner cover, and inner O-rings
• Sealed cups keep out dirt and water
• Maintenance free
• Compatible with 68 mm and 73 mm shell
• Durable anodised finish
• Easy installation

• Bottom Bracket Type: BSA Threaded
• Colour: Black
• Discipline: MTB