Dereilleur precision aligner

Selling the Tune Linientreu Rear Derailleur Setting Tool. You can set up your rear derailleur in minutes. The tool is suitable for 7-, 8-, 9-, 10-, 11- and 12-speed setups. Circuit can be adjusted perfectly by hand: with the Linientreu from Tune The Tune Linientreu gets attached by an allen or Torx key on the derailleur mounting bolts. With the aid of the linear laser, the lower and upper stop on the derailleur can be adjusted precisely.