MainDrive Integrated Headsets feature CNC machined alloy tops with 45/45 degree sealed mechanism retainer bearings.
- S.H.I.S. Stem Clamp Diameter: 28.6 Threadless
- Defined Color: Blue
- S.H.I.S Lower: IS42
- Crown Race: 30
- Bearing Type: Cartridge
- Color: Blue
- S.H.I.S Upper: IS42