The Shimano Road Hub Bearing Kit replaces every bearing in your front and rear Shimano hubs with Grade 3 silicon nitride ceramic hybrids. Precision-matched bearings with DLC-coated steel races and low-contact road seals — optimized for minimum drag. You'll feel the difference on the first ride: smoother spin-up, less rolling resistance, and a freewheel coast that just keeps going. Fits Dura-Ace, Ultegra, and 105 hubs across multiple generations.
What You Get
- ✓ Complete front + rear set — one kit, both wheels
- ✓ Grade 3 Si₃N₄ ceramic balls, hand-graded for roundness
- ✓ DLC-coated races extend bearing life 3–5x vs uncoated
- ✓ Low-contact road seals for minimum drag
- ✓ Drop-in fitment — no special tools needed
- ✓ Swappable seal system (cross seals sold separately)
- ✓ Includes application-specific grease
Technical Specifications
| Seal Type |
Low-Contact Road Seals (included) |
| Tolerance |
ABEC-7 |
| Kit Contents |
4x front hub bearings, 4x rear hub bearings, 2x seal sets, grease syringe |
| Expected Life |
15,000–25,000 miles |
| Race Material |
52100 Chromium Steel, DLC Coated |
| Weight Savings |
~12g vs steel equivalent |
| Bearing Material |
Grade 3 Silicon Nitride (Si₃N₄) |
Compatibility
Shimano Dura-Ace R9100 / R9200
Shimano Ultegra R8000 / R8100
Shimano 105 R7000 / R7100
Shimano GRX RX810 / RX820
Shimano Tiagra (4700 series)