Birzman Chain Wear Indicator II

Checks the degree of chain wear and stretch. Compatible with derailleur chains from single to 12 speed.   Specification

• Material: CNC machined 6061 steel.
• Indications: 0.25 / 0.5 / 0.7 / 0.8 / 1.0%.

  Note: Please check with chain manufacturer for specific replacement instructions.