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The Shimano Bottom Bracket BSA 117.5/68mm 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 and a 68 mm shell width, it fits the most common frame type found on road, urban, trekking and many mountain bikes. The 117.5 mm axle length is a popular choice for achieving proper chainline with many triple and double cranksets, helping to ensure crisp shifting and reduced drivetrain wear over time.
Built with Shimano’s proven bearing technology, this bottom bracket offers durable, low-friction rotation that stands up to everyday riding and challenging conditions alike. Sealed bearings help keep out water and dirt, reducing maintenance needs and extending service life. Whether you are refreshing an older bike, replacing a worn-out unit, or completing a new build with square-taper style cranks, this BSA 117.5/68mm bottom bracket provides a dependable, cost-effective solution. It is ideal for riders who value straightforward installation, compatibility with widely used standards, and the long-term reliability associated with Shimano drivetrain components.
