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Shimano BB-MT501 Bottom Bracket – Hollowtech II BSA 68/73mm (OEM, Not in Retail Packaging)
Description:
The Shimano BB-MT501 is a high-quality Hollowtech II bottom bracket engineered for optimal power transfer, smooth rotation, and long-lasting durability. Designed for modern mountain and trekking bikes, it features upgraded sealing and bearing performance compared to the previous SM-BB52, providing better protection against dirt, water, and wear.
These are OEM Shimano Parts, Brand New, Never Installed on a Bike, Never Used in Any Way, just NOT in the Retail Packaging.
Key Features:
Model: BB-MT501
Type: Hollowtech II External Bottom Bracket
Threading: BSA (1.37” × 24 TPI – English Thread)
Shell Width Compatibility: 68 mm / 73 mm
Spindle Diameter: 24 mm (for all Shimano Hollowtech II cranksets such as Deore, SLX, XT, etc.)
Sealing: Advanced double-lip & labyrinth design for excellent dirt and water resistance
Material: Aluminum alloy cups with precision-sealed cartridge bearings
Weight: Approx. 82 g
Color: Black
Package Includes:
Compatible with all Shimano Hollowtech II MTB and Trekking cranksets (e.g., FC-M5100, M6100, M7100, M8100, M8120, etc.)
Fits frames with standard BSA (English) threaded bottom-bracket shells
Not compatible with Press-Fit (BB-MT500-PA) frames
Installation Note:
For 68 mm shells: use two spacers on the drive side and one on the non-drive side.
For 73 mm shells: use one spacer on the drive side only.
Apply grease to threads and follow Shimano torque specifications for best performance.
