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.
Free Returns on all New / Unused products.
Our return policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
To start a return simply click the main menu and select option "Start a Return" and follow the instructions