The Shimano SM‑BB72‑41B is a press‑fit bottom bracket designed for bikes with BB86/92 shell standards (86.5 mm width, 41 mm inner diameter). It features Hollowtech II composite cups that house sealed steel cartridge bearings, offering smooth pedaling with low friction and reliable performance. The unit is lightweight, includes labyrinth seals for protection against moisture and dirt, and is built to reduce creaking while maintaining stiffness and long-term durability.

• Designed for BB86/92 frames: fits 86.5 mm shell width and 41 mm internal diameter

• Compatible with Shimano Hollowtech II 24 mm spindle cranksets such as Ultegra, 105, and GRX

• Composite resin cups with sealed steel cartridge bearings for smooth, precise rotation

• Labyrinth sealing system for enhanced resistance to water and debris

• Lightweight at approximately 64–69 g per kit

• Engineered for rigidity, low friction, and minimized creaking under load