Park Tool - CC-4.2 Drop In Chain Checker Saddle With the MIK Carrier Plate

With the MIK Carrier Plate

SRAM XX1 X-HORIZON 11 SPEED REAR DERAILLEUR

This light adds an additional level of visibility and a must for the conscientious rider that wants to be seen

The safety lock is activated with a thumb push

The round cross-section shape mimics the natural shape of the tire

Park Tool - CC-4.2 Drop In Chain Checker Saddle With the MIK Carrier PlatePARK TOOL CC 4. 2 DROP IN CHAIN CHECKER A 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