TB-3330

2-in-1 chain checker and chain hook

Quickly and accurately indicates chain wear for timely replacement.
Fits 5 to 13-speed chains, including SRAM® T-Type, SRAM® Flattop™, and Shimano® XTR® 12-speed chains.
For single speed chains: replace at or just before 1% wear.
For 5-to-10-speed chains: replace at or just before 0.75% wear.
For 11-to-13-speed chains: replace at or just before 0.5% wear.
Built-in chain hook holds the chain in place for easy installation or removal.
Note: The indicated chain speed specification is for reference only. Please follow the chain manufacturer's manual for the precise replacement.