The American Cycle Systems Integrated Note: Fits forks with 26.4mm crown only. Features: 1" Conversion headset allows the use of 1" forks on a race frame with 1-1/8" integrated headtube CNC machined alloy compression cap with star nut and bolt Available in multiple finishes Specifications: Bearings: 45/45 Steerer Diameter: 1", 1-1/8" and 1 1/8" to 1" reducer Weight: 93 g