Park Tool CC-4.2 Chain Checker Tool MFPN=SPC1-31.8-01 Same bits as 8-Bit System

Same bits as 8-Bit System and EnCase System multi-tools

5mm hex on both ends of the axle for easy installation and removal

}SRAM Eagle PG-1210/1230 Cassette Replacement Cogs - 11-13-15 Cogs Lockring Included

}SRAM GX Eagle Boost Crankset - 170mm 12-Speed 32t Direct Mount DUB Spindle Interface Lunar 55mm Chainline

142 x 12mm and 148 x 12mm

Park Tool CC-4.2 Chain Checker Tool MFPN=SPC1-31.8-01 Same bits as 8-Bit SystemA 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