This Box Pinion cog fits the Box One driver, Harmonic driver, or any Shimanocompatible driver and is manufactured of CNC machined 7000 series aluminum. Chain Fit: 3/32″ recommended (1/8″ can be used as well).

Weights:

• 13t: 8 grams / 0.3 ounces
• 14t: 11 grams / 0.4 ounces
• 15t: 13 grams / 0.5 ounces
• 16t: 14 grams / 0.8 ounces
• 17t: 16 grams / 0.6 ounces
• 18t: 18 grams / 0.65 ounces