The Shimano 105 5500 Bottom Bracket Octalink 68/118 is a high-quality bottom bracket designed for optimal performance on your bike. With its Octalink design, this bottom bracket offers increased stiffness and efficiency, allowing for a smoother and more powerful ride. The durable construction ensures long-lasting performance, while the easy installation process makes it convenient for riders of all levels. Compatible with Shimano 105 5500 cranksets, this bottom bracket is a reliable choice for any cyclist looking to upgrade their bike's components.