Trek's Bontrager Aeolus wheels deliver serious performance out of the box. Our ceramic bearing kit takes them further — Grade 3 silicon nitride balls with DLC-coated races in every hub bearing. The Aeolus hub platform benefits enormously from the reduced friction, especially at higher speeds where bearing drag compounds. Works with Aeolus RSL, Pro, and Comp hub versions.
What You Get
- ✓ Complete front + rear set for Bontrager Aeolus hubs
- ✓ Grade 3 Si₃N₄ ceramic balls, hand-graded for roundness
- ✓ DLC-coated races extend bearing life 3–5x vs uncoated
- ✓ Compatible with RSL, Pro, and Comp hub tiers
- ✓ Drop-in replacement — no modifications needed
- ✓ Swappable seal system (cross seals sold separately)
Technical Specifications
| Seal Type |
Low-Contact Road Seals (included) |
| Tolerance |
ABEC-7 |
| Kit Contents |
2x 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 |
~11g vs steel equivalent |
| Bearing Material |
Grade 3 Silicon Nitride (Si₃N₄) |
Compatibility
Bontrager Aeolus RSL 37 / 51 / 62 / 75
Bontrager Aeolus Pro 37 / 51
Bontrager Aeolus Comp
Bontrager Aeolus RSL TLR Disc