ACS MainDrive Integrated Headset - 1-1/8" Black. MainDrive Integrated Headsets feature CNC machined alloy tops with 45/45 degree sealed mechanism retainer bearings.
- TECH SPECS
| S.H.I.S. Stem Clamp Diameter | 28.6 Threadless |
| Defined Color | Black |
| S.H.I.S Lower | IS42 |
| Crown Race | 30 |
| Bearing Type | Cartridge |
| Color | Black |
| S.H.I.S Upper | IS42 |