FSA Xtreme Pro Lower Headset

FSA Xtreme Pro Lower Headset. See specification below for each headset model.

Features

• High quality stainless steel bearings
• Higher quality seals
• Laser etched graphic to easily identify the headset spec plus provides a higher quality look

Sizing

ZS44/40: For 1.5"" tapered forks.

Specification

• Inner Diameter: 44.0mm
• Outer Diameter: 62.0mm
• Lower: 1.5"", 36x45° ACB (Grey seal)
• Weight: 78.7g

EC49/40: For 1.5"" tapered forks.

Specification

• Inner Diameter: 49.6mm
• Outer Diameter: 60.0mm
• Lower: Alloy Cups With 1.5"", 36x45° ACB (Grey seal)
• Weight: 78.3g

IS41/28.6: For 1-1/8"" tapered fork.

Specification

• Inner Diameter: 41.2mm
• Outer Diameter: 45.0mm
• Lower: 36x45° ACB (Grey seal)
• Weight: 24.2g

IS42/30: For .1/8"" tapered forks.

Specification

• Inner Diameter: 42.0mm
• Outer Diameter: 46.0mm
• Lower: 45x45° ACB (Grey seal)
• Weight: 34.7g

IS49: For 1.25"" tapered forks.

Specification

• Inner Diameter: 47.0mm
• Outer Diameter: 62.0mm
• Lower: 1.25"", 45x45° ACB (Grey seal)
• Weight: 34.8g

IS52/40: For 1.5"" tapered forks.

Specification

• Inner Diameter: 51.2mm
• Lower: 1.5"", 36x45° ACB (Black seal)
• Weight: 46.5g

ZS56/40: For 1.5"" tapered forks.

Specification

• Inner Diameter: 56.0mm
• Outer Diameter: 62.0mm
• Lower: Alloy Cup With 1.5"", 36x45° ACB (Grey seal)
• Weight: 60.5g

ZS44/28.6: For 44mm ID head tubes.

Features

• Alloy top cover
• 1-1/8"" steerer

Specification

• Inner Diameter: 44.0mm
• Outer Diameter: 50.0mm
• Upper: 1.1/8"", 36x45° ACB (Grey seal)
• Discipline: Road, MTB
• Material Aluminum
• Weight: 34.2g