Park Tool Chain Checker CC-4.2 KIDS ROAD BIKES The PRO Discover Aero Carbon

The PRO Discover Aero Carbon Handlebar is built to facilitate exploration

Sleek and comfortable

Lightweight alloy lever body

Micro-USB rechargeable - Charges via any standard USB port (charging cable included)

Park Tool Chain Checker CC-4.2 KIDS ROAD BIKES The PRO Discover Aero CarbonA worn bicycle chain causes poor shifting performance and can actually wear out drivetrain components, causing more expensive problems. The Park Tool CC 4. 2 Chain Checker is a drop in style gauge that measures bicycle chain wear. The laser cut CC 4. 2 accurately measures a long section of chain and strategically comes in contact with the chain in three places, quickly and easily taking the guesswork out of determining when chain replacement is