Park Tool CC-4.2 Chain Checker Nutrition GXP and BB30 models

GXP and BB30 models

Rolls Pro is suitable for use after having cleaned the chain and drivetrain with Chain Cleaner

Never exceed the temperature of 100°C (212°F)

Per Gel (40g)

System engineering at its peak

Park Tool CC-4.2 Chain Checker Nutrition GXP and BB30 modelsA 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