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BOX Cosine Chainring, 104BCD X 38t - Black 
BuyPART NUM 618508
CNC machined 6061-T6 aluminum with rounded tooth profile to reduce chain wear Item Specifications speed: 1x armxBCD: 4x104mm teeth: 38t … read more
Ships Freeyour price $54.99 + ships free
BuyPART NUM 618508 These models are available for online purchasing and can be shipped directly to you.
Bolt Circle Diameter (BCD) is the diameter of an imaginary circle running through the center of the chainring mounting holes. It is always defined in millimeters.
Chainring Teeth
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