Problem Solvers Chain Spy
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Problem Solvers' Chain Spy is a chain retention device that keeps a watchful eye on your chain while you focus on blasting along the path ahead. Choose between the 31.8mm clamp model, or the Direct Mount model, depending on your bike's needs.
Direct Mount version designed for use with Problem Solvers Direct-Mount Adapters (sold separately).
WARNING: This product can expose you to chemicals, including lead, known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.