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 | 00689228109544 | ISMBBR60B | SHI-ISMBBR60B |
| Italian thread | 00689228108448 | ISMBBR60I | QBP-CR6802 |
| Press Fit | 00689228122567 | ISMBB7241B | SHI-ISMBB7241B |