I still ride a 1980 Schwinn Traveler that I purchased new in June , 1980. On my last ride I discovered the front derailleur had gotten pretty mangled by the chain. It is a Shimano FE. I thought I could go on-line or all the former Schwinn store and easily get a replacement, but it seems things aren't that easy. Can anyone suggest a replacement? Will the Shimano 105 work? The Shimano 105 literature says to use only with a Shimano super-narrow type chain. Is that what I have? From visual inspection and the owner's manual I have gleaned the following:Front sprockets have 40T and 52T. Derailleur is bottom pull. Existing derailleur is 1-1/8" clamp-on.