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 45-teeth.
| BCD | 104mm |
| Material | 6061-T6 Aluminum |
| Origin | Made in USA |
| Thickness | 3.5mm |
| 38 Tooth | 73 grams / 2.57 ounces |
| 39 Tooth | 78 grams / 2.75 ounces |
| 40 Tooth | 79 grams / 2.78 ounces |
| 41 Tooth | 84 grams / 2.96 ounces |
| 42 Tooth | 87 grams / 3.07 ounces |
| 43 Tooth | 90 grams / 3.17 ounces |
| 44 Tooth | 92 grams / 3.25 ounces |
| 45 Tooth | 96 grams / 3.38 ounces |
