Made in the US from 6061-T6 aluminium alloy, Box Two™ Chainrings are round and true. They fit 104 BCD four-bolt cranks and are available in black anodised with laser-etched graphics from 38 to 45-teeth.
 
 
SPECIFICATIONS:
Material: 6061-T6 Aluminium
Process: Extruded & CNC Machined
Finish: Anodized w/Laser-Etched Graphics
BCD: 104mm
Chain pitch : 3/32”
Thickness: 3.5mm