Park Tool CC-4 Chain Wear Indicator Apparel_Men's Tri Top MSDS info available upon request

MSDS info available upon request

Whether you're engaged in baseball

Wind-Tunnel Tested

OpenFit continues the Shokz open-ear concept to let users enjoy all-day comfort and hear their own soundtrack while staying open to the world around them

formerly known as Aeropex

Park Tool CC-4 Chain Wear Indicator Apparel_Men's Tri Top MSDS info available upon requestThe Park Tool CC 4 Chain Checker is a drop in style gauge that measures bicycle chain wear. The laser cut CC 4 accurately measures a long section of chain and strategically comes in contact with the chain in three places, quickly and easily taking the guesswork out of determining when chain replacement is necessary. The tool works on any 5 to 12 speed derailleur chain (including SRAM T Type, SRAM Flattop, and Shimano XTR 12 speed chains) and is