Shimano 105 BB-5500 Octalink bottom bracket 70mm

Cranks and bottom brackets have a decisive impact on the overall performance of a bicycle. Smooth operation, effective power transfer, and high durability are essential factors when choosing a crankset. Shimano manufactures a wide range of different cranksets and compatible bottom brackets, ensuring that there is an optimally suitable system for every bike and discipline. Hollowtech II features 24 mm axles and bearings. After analyzing all factors and conducting tests, we opted for axles and bearings with a 24 mm diameter. This provides the best possible balance of rotational efficiency, stiffness, load capacity, sealing, and weight, all in proven Shimano quality. The Octalink eight-point engagement of the bottom bracket axle and crank ensures optimized engagement and more efficient power transfer. The hollow axle significantly increases the stiffness of the bearing. Angled ribs ensure a permanently load-bearing connection between the bottom bracket axle and the crank.

• Intended use: Road bike
• Design: Hollow axle
• Installation width: 70 mm
• Frame compatibility: Italian bottom bracket
• Design: Cartridge bearing
• Axle
• Axle interface: Octalink
• Axle length: 109.5 mm.