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The Shimano Bottom Bracket BSA 113mm/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 that require a 113 mm axle length. This makes it a popular choice for many mountain, trekking, and hybrid bikes that use square-taper or compatible crank interfaces, depending on the specific version.
Built with Shimano’s proven bearing quality and sealing, this bottom bracket is engineered to keep dirt, water, and grit out, extending service life and reducing maintenance needs. The durable cups and well-protected bearings help maintain a smooth, quiet pedaling feel even in challenging riding conditions. Whether you are refreshing an older bike, completing a drivetrain overhaul, or building up a dependable commuter, the Shimano Bottom Bracket BSA 113mm/73mm offers a straightforward, cost-effective solution that emphasizes longevity, compatibility, and consistent performance.
