Park Tool CC-4.2 Chain Checker Nutrition Total Capacity: 31T

Total Capacity: 31T

flat-tires ruin rides

Zero/Calibration: Auto Zero

So you can ride with confidence over bumps and jumps knowing that your iPhone or Galaxy isn’t going anywhere your bike isn’t

GXP and BB30 models

Park Tool CC-4.2 Chain Checker Nutrition Total Capacity: 31TA 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