- Durable CroMo-steel axle construction
- Lightweight at approximately 250g
- Compatible with 2-speed cranks
- Selectable frame types for versatility
- Octalink axle profile for improved performance
The Shimano 105 BB-5500 Bottom Bracket Unit 68x109mm is designed for cyclists seeking reliability and performance. Constructed with a durable CroMo-steel axle and lightweight aluminum cups, this bottom bracket ensures longevity while maintaining a low weight of approximately 250g. It features a selectable frame type, accommodating both BSA and ITA shell widths, and is specifically engineered for 2-speed cranks. The Octalink axle profile enhances power transfer, making it an excellent choice for serious cyclists looking to upgrade their drivetrain.

In this rapidly changing world, everyone is seeking a healthier and more enriched lifestyle. While it is important to accept changes proactively, we must also adhere to something basic, and something unchangeable, upon which we should create new value. Shimano hopes to help realize such a wonderful lifestyle by offering bicycle components, fishing tackle, and rowing equipment.
Taking advantage of original technologies and a wealth of experience accumulated throughout Shimano’s long history, they develop innovative products that go beyond the expectations of cyclists, anglers, and rowers. Shimano believe that their Captivating Products should feature not only exceptional quality and performance, but also a fascinating design that appeals to respective users’ sensitivities at first touch.
Click & Collect Available
• In-stock items usually ready in 4 hours* • Online Only items usually ready in 1-3 working days More info »
Courier Delivery Available
• $9.99 for orders $99 & under • Free for orders over $99 • Bulky shipping fees apply for bikes & bulky items based on item weight More info »