Park Tool Chainring Diameter Gauge Blue fitness and sprinkling gales

and sprinkling gales

Other trail-specific features include our GoggleGuide adjustable visor

digital music players

you'll be equipped to ride harder and faster than you previously thought possible--all without worrying about your friends picking up the pieces afterwards

Park Tool Chainring Diameter Gauge Blue fitness and sprinkling galesInformation: The CDG 2 easily and accurately measures bolt circle diameter (BCD) in millimeters for a wide variety of four and five bolt chainring patterns. Made of anodized aluminum and permanently laser engraved, the tool centers itself in chainring holes, chainring bolts, or crank arm holes. The CDG 2 also includes a center to center distance scale and a handy reference chart listing additional mounting pattern measurements.