ACS MainDrive Integrated Headset - 1-1/8" Blue. MainDrive Integrated Headsets feature CNC machined alloy tops with 45/45 degree sealed mechanism retainer bearings. TECH SPECSColor BlueBearing Type CartridgeCrown Race 30Defined Color BlueS.H.I.S Upper IS42S
ACS MainDrive Integrated Headset – 1-1/8″ Blue. MainDrive Integrated Headsets feature CNC machined alloy tops with 45/45 degree sealed mechanism retainer bearings.
| Color | Blue |
| Bearing Type | Cartridge |
| Crown Race | 30 |
| Defined Color | Blue |
| S.H.I.S Upper | IS42 |
| S.H.I.S. Stem Clamp Diameter | 28.6 Threadless |
| S.H.I.S Lower | IS42 |
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