Park Tool CC-4.2 Chain Checker Tool MFPN=DRY1C10S delivers impressive rim durability and

delivers impressive rim durability and impact resistance

Nordic Closing System: Central zipper

5mm Cool Gray

Fits most mountain bars and most road bars thanks to a storage sleeve with a customizable rubber flap that can be cut to meet your handlebar's inner diameter

(XDR) (+/- 2%)

Park Tool CC-4.2 Chain Checker Tool MFPN=DRY1C10S delivers impressive rim durability andA worn bicycle chain can cause poor shifting and expensive drivetrain damage. The Park Tool CC 4. 2 Chain Checker is a drop in gauge that measures chain wear accurately. It contacts the chain in three places eliminating guesswork. Compatible with 5 to 13 speed and single speed chains it indicates wear at 0. 5% 0. 75% and 1. 0% matching manufacturer replacement recommendations. Measures bicycle chain wear accurately preventing expensive drivetrain