Made in the US from 7075 aluminum alloy, Cosine Chainrings are round and true. They fit 104-BCD four-bolt cranks. The 7075 rings come in sizes of 41 to 44-teeth only and have a durable hard anodized finish.
BCD: 104mm
Material: 7075-T6 Aluminum
Origin: Made in USA
Thickness: 3.5mm
41 Tooth: 84 grams / 2.9 ounces
42 Tooth: 87 grams / 3.1 ounces
43 Tooth: 90 grams / 3.2 ounces
44 Tooth: 92 grams / 3.2 ounces
SIZE: 41T, 42T, 43T, 44T, 45T