Reverse Colab Expert Chain Tensioner Black

Replaces rear derailleur with chain tensioner for a simple, secure drivetrain- Expert version elevates the Colab chain tensioner for the most extreme use and easy adjustment- Adding 15mm of adjustability for the chainline by loosening one bolt, the Expert version helps riders achieve perfect chain alignment without the removal of the tensioner- Adjustable limit stopper as well as a pinch bolt on the mounting bracket and higher spring tension provide more chain retention and also maintains position when the rear wheel is removed- Compatible with 9/10/11-speed chains, 13-17 tooth cogs- Aluminum construction, made in Germany