Made in the US from 6061-T6 aluminum alloy, Cosine 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.
- Made in the USA
- BCD: 104mm
- Weight: 73g (38t), 78g (39t), 79g (40t), 84g (41t)
- Weight: 87g (42t), 90g (43t), 92g (44t), 96g (45t)