Simply insert the Chain Checker’s pins into two links, lightly press the swing arm gauge, and then check the gauge window for an accurate reading. The CC-2 is compatible with most single-speed and derailleur chains, including Shimano XTR 12-speed chains.

• 5-to-10 speed chains: replace chain at or just before 0.75%
• 11-to-12 speed chains*: replace at or just before 0.5%
• Single-speed chains: replace at or just before 1%
• Check with manufacturer for specific replacement instructions
• *Use the CC-4 for SRAM Flattop and SRAM T-Type 12-speed chains
• Compatible with all bicycle chains
• For modern 9 and 10 speed chains, replace chain at or just before the 0.75% readings
• For 11 speed chains, replace at or just before the 0.5% reading
• Insert the Chain Checker's pins into two links, press the swing arm gauge tight, and check the gauge window for an accurate reading