Made in the US from 6061-T6 aluminum alloy, Box Two™ Chainrings are round and true. They fit 104 BCD four-bolt cranks and are available in black anodized with laser-etched graphics from 38 to 47-teeth.

Material: 6061-T6 Aluminum
Process: Extruded & CNC Machined
Finish: Anodized w/Laser-Etched Graphics
Compatibility:
• BCD: 104mm
• Chain: 3/32”
Size:
• Thickness: 3.5mm
• Diameter/Weight:
• 38 T 73 g / 2.57 oz
• 39 T 78 g / 2.75 oz
• 40 T 79 g / 2.78 oz
• 41 T 84 g / 2.96 oz
• 42 T 87 g / 3.07 oz
• 43 T 90 g / 3.17 oz
• 44 T 92 g / 3.25 oz