Park CC-3.2 Chain Checker Tool - for 3/32" and 1/8" Chains 1 3/4" S-7 Fits metric M30x1mm BMX hub

Fits metric M30x1mm BMX hub threads

with an internal cutout that lightens it up

full cutout webbing for weight reduction

and a 19mm adapter is included

75% side fits flat into the chain - for 11 and 12-speed chain

Park CC-3.2 Chain Checker Tool - for 3/32" and 1/8" Chains 1 3/4" S-7 Fits metric M30x1mm BMX hubThe CC 3. 2 is a go no go gauge designed to accurately indicate when a chain reaches . 5% and . 75% "stretch," the points at which most chain manufacturers suggest replacement For 1, 5, 6 ,7, 8, 9 and 10 speed chains, replace chain just as the gauge fits the 0. 75% side fits flat into the chain for 11 and 12 speed chain, replace as the 0. 5% side fits Long, accurate and features permanent measurement markings Works on most chains from single to 12