Tangeseiki LN79SL BSA Threaded Bottom Bracket

The Tangeseiki LN79SL BSA Threaded Bottom Bracket is a versatile and durable solution designed for modern road and MTB drivetrains. Built around Tangeseiki’s reputation for precision engineering, it delivers smooth rotation, reliable alignment and long-term performance for everyday riding and training use.

Universal Crank Compatibility: A key feature of the LN79SL is its slidable center sleeve design, which allows compatibility with a wide range of cranksets. This flexible internal structure ensures proper spacing and alignment, making it suitable for different crank standards without compromising drivetrain efficiency.

Precision-Machined Construction: The cups and center sleeve are CNC precision machined from lightweight alloy, balancing strength with reduced weight. This construction ensures accurate threading into BSA frames and maintains consistent bearing positioning under pedaling loads.

Smooth Bearing Interface: With a bearing inner diameter designed for 24 mm crank spindles, the LN79SL supports smooth power transfer and stable rotation. The bearing interface is engineered to minimize friction while maintaining durability for extended service life.

Ideal for riders seeking a dependable threaded bottom bracket, the LN79SL combines ease of installation with consistent performance.

We ship across India. Shipping is free on orders above ₹2,000, and ₹99 is charged on orders below ₹2,000. Cash on Delivery is available for orders up to ₹20,000, with additional COD charges based on order value. Most orders are delivered within 3–6 working days, though delays may occasionally occur. Please note that most Shimano products may take longer to ship. View full shipping policy.

Returns can be initiated within 7 days of delivery. Items must be unused, in original condition, and returned with all tags and packaging intact. Returns are available only on select categories such as apparel, helmets, jerseys, gloves, and similar items. Wetsuits and products discounted above 5% are not eligible for return.

Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. Return shipping must be arranged by the customer, as pickup is not available.

For eligible returns, you can choose an exchange, store credit, or a monetary refund. Refunds are processed after deduction of applicable shipping and transaction charges. Order cancellations are only possible before the order is processed. View full Return & Refund Policy.