Chain wear indicator

• Accurately measures 0.5% and 0.75% chain wear – the wear levels at which chain manufacturers most often recommend replacement.
• Works on all 6- to 13-speed chains, including Sram flat-top chains.
• 11–13 speed chains – replace at or before 0.5% wear
• 6–10 speed chains – replace at or before 0.75% wear

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