Chainline Checker

Fits many different frame/crank combinations
Clamps to the chainring and provides reference to guide when setting up a chainline for optimum alignment
Range of application from single speed to 11-speed cassettes

This tool is used to determine a nominal center line of the chainrings to the center line of the cassette. Works with single, double and triple chainrings, using cassettes from 5 through 11 cogs. Also works with single speed and fixed gear applications.