Shimano BB-MT501 BSA Bottom Bracket

The Shimano Deore BB-MT501 bottom bracket is an external-bearing model with a BSA thread, designed for replacing a worn bottom bracket on a mountain bike. It fits 68 and 73 mm shells.

• Fits 68 mm and 73 mm shells, with spacers included in the pack
• British BSA thread: check that your frame is not press-fit, as it is not compatible
• 24 mm Hollowtech II spindle, for Shimano Deore, CUES, ZEE and Alivio cranksets
• External bearings, easy to fit and replace when worn
• How to choose: check the shell width (68 or 73 mm) and your crankset model

Technical specifications

• Standard: BSA, British thread
• Shell width: 68 mm and 73 mm (spacers included for both)
• Spindle diameter: 24 mm (Hollowtech II)
• Mounting type: External bearings
• Shell diameter: 33.6-33.9 mm
• Press-fit: Not compatible with press-fit shells
• Deore crankset compatibility: FC-M6100, FC-M6120, FC-M6130, FC-M5100, FC-M6000, FC-M4100, FC-M617, FC-T6010, FC-M627, FC-MT500, FC-MT510, FC-MT511, FC-MT512, FC-MT610, FC-MT210, FC-MT200
• Other series crankset compatibility: ZEE: FC-M640, FC-M645; CUES: FC-U4010, FC-U6000, FC-U6010; Alivio: FC-T4060; FC-T551
• Contents: Right cup with bearings, left cup with bearings, centre tube, 2.5 mm spacers (x2), 1.8 mm (x1), 0.7 mm (x1)
• Manufacturer code (SKU): BBMT501B

Founded in 1921 in Sakai, Japan, by Shozaburo Shimano, Shimano is still based in the same city today. For cyclists, it makes drivetrains, brakes, wheels, pedals and cycling shoes. Its history in bicycle components began with the production of freewheels in 1922.