Joined: Sep 2011
Posts: 1,168
Likes: 23
From: The First State.
Bikes: Schwinn Continental, Schwinn Paramount, Schwinn High Plains, Schwinn World Sport, Trek 420, Trek 930,Trek 660, Novara X-R, Giant Iguana. Fuji Sagres mixte.
I don't think that RD was original to a Trek 420. An inexpensive Deore or Alivio RD should have plenty of travel