Dropouts: RocknRollout dropouts allows the frame to do 3 things:

  • the rear hanger to be replaced if a derailleur is damaged.
  • splits the frame for belt drive.
  • adjusts the wheelbase for belt/chain tensioning.

OLSEN RocknRollout dropouts can be replaced and 142 can be replaced for 135. 142 is a stable internal hub gear format for Kindernay and Rohloff. 135 has a large second hand market with Rohloff and Alfine11.