Sigma Sport's Cadence Power Magnet is the correct replacement magnet for any Sigma Sport computer featuring cadence (computers sold separately). It attaches to your crankarm with zip ties and double-sided tape (both included).
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953 Ritchie Highway Arnold, MD 21012
Phone: (410) 544-3532
Store Hours: Mon-Fri 10-7, Sat 9-6 & Sun 11-5