Integrated (IS) headsets recess the bearing directly into the frame's headtube, reducing stack height and improving aesthetics. The IS42/28.6 configuration fits frames with 42mm integrated headtube cups and 1-1/8" fork steerers. Our ceramic bearing set replaces both upper and lower positions with Grade 3 silicon nitride bearings, DLC-coated races, and ABEC-7 tolerances.
What You Get
- ✓ Grade 3 Si₃N₄ ceramic balls — reduced steering friction from ride one
- ✓ DLC-coated chromium steel races for extended bearing life
- ✓ ABEC-7 precision tolerances for smooth, play-free steering
- ✓ Matched pair: upper and lower bearings included
- ✓ Designed for integrated headtube cup systems
Technical Specifications
| Includes |
2 bearings |
| Seal Type |
Integrated contact seals |
| Tolerance |
ABEC-7 |
| Cup Diameter |
42mm |
| Fork Steerer |
28.6mm (1-1/8 inch) |
| Expected Life |
20,000–35,000 miles |
| Race Material |
52100 Chromium Steel, DLC Coated |
| Bearing Material |
Grade 3 Silicon Nitride (Si₃N₄) |
| Bearing Standard |
IS42/28.6 |
Compatibility
Frames with IS42 integrated headset cups
Scott Addict and Foil series
BMC Road Machine and Roadmachine
Some Pinarello models
Look 695 and 796 series