Zuoyou Bicycle Bike Chain Wear Indicator Chain Checker Tool for Mountain Bike Folding Bicycle Road Vehicles MTB

Specification: Material: Carbon Steel Total Length: Approx. 140.5mm / 55.3inch Width: Approx. 47mm / 18.5inch Description: A worn chain shifts poorly and wears sprockets at an accelerated rate. 0.75% and 1%, the points at which chain experts suggest replacement. Compatible with all chains. Easy to use. Package Includes: 1 Piece Chain Checker Note: Product chain size: .75 means that the chain is stretched 0.75mm for every 11 knots. 1.0 means that the chain is stretched by 1mm every 11 knots.