Shimano's Ultegra bottom bracket uses Pro Tour-proven technology for lighter weight and super smooth spinning, while still maintaining the same level of durability and stiffness. It's available in English, Italian, or Press Fit models.
Option | Barcode | Manufacturer's Part Number | Vendor Number |
---|---|---|---|
English thread | 689228109544 | ISMBBR60B | QBP-CR6800 |
Italian thread | 689228108448 | ISMBBR60I | QBP-CR6802 |
Press Fit | 689228122567 | ISMBB7241B | QBP-CR6804 |