The Shimano Tourney TZ400 rear derailleur is made for 18 or 21 speed bikes. The line is recommended for basic and entry-level bicycles, but which require quality and precision when changing gears. With a fixing system, tip, comes with a screw
5 mm Allen, which is used to fix the derailleur on the bike. For 6/7 speeds.
The TZ400 features the Shimano Index System,
which basically consists of a mechanism integrated into the bike, which allows a synchronized action of the rear derailleur and shifter, providing a faster and noise-free shifting action.
