Shimano Dura-Ace BB9000 Italian Bottom Bracket
The new Shimano Dura-Ace BB9000 Bottom Bracket continues the Shimano tradition of the outboard bearing, and like the whole 9000 group set, it's lighter, stronger, and faster than previous iterations.
- Italian thread only
- Outside bearing position for maximum weight distribution and stability
- A smaller bearing size for decreased friction helping to increase power transfer
- New sealing system to help increase longevity, minimize weight, and increase performance
- Weighs 80 grams