Cone ring for Schlumpf Drive Units. One ring is needed between frame and drive unit excect on Mountain Drive units with torque arm. Mis-match cone ring material and frame material for better friction and less chance of gear unit slipping in frame.
The aluminum cone is great for steel and titanium frames.
For Schlumpf Drive installation documents and manuals click on the Schlumpf Drive resource page Here. More information can also be found on the Schlump Drive FAQ page Here.
