시마노 TOURNEY TY - 6, 7, 8-Speed - HYPERGLIDE MTB Chain The HG-40 chain is designed for precise index shifting on 6, 7, and 8-speed HYPERDRIVE SIS and DUAL SIS drivetrains.Features:- HG chain for precise HYPERDRIVE SIS/DUAL SIS index shiftingSpecifications:- Series: Tourney- Average weight: 324- Type: HG 8/7/6-speedTechnology:HG Cassette:- The distinctively designed HYPERGLIDE cassette incorporate specially positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result. The HG cassette, which was developed for the MTB 10-speed system, underwent comprehensive optimization to achieve super-highly efficient shifting.