Problem Solvers ChainSpy Chain Retention Device Option:31.8mm with shims for 28.6mm Carries up to 4 bikes

Carries up to 4 bikes

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Problem Solvers ChainSpy Chain Retention Device Option:31.8mm with shims for 28.6mm Carries up to 4 bikesProblem Solvers ChainSpy Chain Retention Device Problem Solvers offers two chain retention devices to keep an ever watchful eye on your chain while you are looking at what is in front of you. The Chainspy features composite "spies" and an alloy body. It is adjustable for different chainlines. ChainSpy 1 will be mounted with an integrated 31. 8 28. 6 mm clamp (shims included).