Description
PARK TOOL - CDG-2 - CHAINRING DIAMETER GAUGE
The CDG-2 easily and accurately measures bolt circle diameter (BCD) in millimetres for a wide variety of four- and five-bolt chainring patterns. Made of anodized aluminium and permanently laser engraved, the tool centres itself in chainring holes, chainring bolts, or crank arm holes. The CDG-2 also includes a centre-to-centre distance scale and a handy reference chart listing additional mounting pattern measurements.