TB-3329

Chain checker

Quickly and accurately indicates the bicycle chain wear.
Fits 5 to 13 speed chains. (including SRAM® T-Type, SRAM® Flattop™, and Shimano® XTR® 12 speed chains)
5-to-10-speed chains: replace chain at or just before 0.75%.
11-to-13-speed chains: replace at or just before 0.5%.