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
SIZE: 38T, 39T, 40T, 41T, 42T, 43T, 44T, 45T