80,120 Bicycle Chainrings
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.
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Truvativ XX 2x10sp S-Works Spider+rings, 28/42t 
Info
XX-designed splined spider and chainring set to fit Specialized's S-Works hollow-carbon/hirth-joint cranks with removable spider X-Glide … read more
Ships Freeyour price $157.00 + ships free
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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