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The Shimano Bottom Bracket BSA 118mm/73mm is a reliable, threaded bottom bracket designed for smooth, efficient power transfer on a wide range of bikes. Using the classic BSA (English) thread standard, it fits frames with a 73 mm bottom bracket shell and is matched to cranksets requiring a 118 mm spindle length. This makes it a popular choice for many mountain, trekking, and hybrid bikes that use square-taper or similar crank interfaces. Shimano’s proven bearing quality helps reduce friction and improve durability, so your pedaling feels consistent and responsive over time.
Engineered for everyday riders and enthusiasts alike, this bottom bracket is built to withstand regular use in varied conditions, from daily commuting to weekend trail rides. The sealed bearing design helps keep out dirt and moisture, reducing maintenance needs and extending service life. Installation is straightforward for any mechanic familiar with BSA threaded systems, and replacement is simple when it’s time for a refresh. Whether you are completing a new build or upgrading a worn-out unit, the Shimano Bottom Bracket BSA 118mm/73mm offers dependable performance, solid value, and compatibility with a broad range of Shimano and third-party cranksets.
