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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
your price $157.00 + ships freeInfo
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.
This is the part number or identifier for this item from the manufacturer
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