The DCA-1 can be easily attached to most digital, dial, or vernier calipers (including the Park Tool DC-1) to accurately measure the center of disc brake rotors. By using protruding contact points and conical end points, this tool bypasses the unworn edge and can also measure center-to-center distances of bolt holes for calculating bolt circle diameter (BCD) of chainrings and cranks. Regularly checking for wear is crucial for maintaining safety and optimal performance.
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