CC-4 Chain Wear Indicator cameras & mounts the HX 531 with its

the HX 531 with its 30mm internal width is the perfect choice

M15 Bolts included

Phil Wood High-Flange Rear Hubs

Mesh fabric under the arms for extra ventilation

debossed neoprene cuff closure makes for a snug fit around your wrist

CC-4 Chain Wear Indicator cameras & mounts the HX 531 with itsThe 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