The Box One Cassette Spacer Kit is extruded and CNC-machined from 6061-T6 aluminum and features a super lightweight minimalist design. Packaged in 4 piece kits which provide 1 to 10 millimeters of spacing adjustment to dial in that chain line.

Adjustable from 1mm to 10mm for Adjusting Chainline
Extremely Lightweight XO Skeleton Design

Material: 6061-T6 Aluminum
Process: Extruded & CNC Machined
Finish: Anodized
Size:
• Spacing: 1-10mm
• 1mm [2]
• 3mm [1]
• 5mm [1]
Compatibility:
• Driver: HG Freehub Body