Park Tool CC-4.2 Chain Checker Tool MFPN=SPC1-31.8-01 }SRAM PG-850 Cassette - 8

}SRAM PG-850 Cassette - 8 Speed 11-28t Silver

142 x 12mm and 148 x 12mm

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

110x115mm (LxW)

Park Tool CC-4.2 Chain Checker Tool MFPN=SPC1-31.8-01 }SRAM PG-850 Cassette - 8A 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