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Affinity Pro Track Chainring, 144mm, 47T, Hard Anodized Black 
Info
Precision double CNC machined 144bcd reliable track chain rings sized 47-65 tooth Polish silver or hard anodized finish, profiled teeth = … read more
your price $85.99
Info 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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