Schwinn GT420 Le Tour

Schwinn GT420 Le Tour derailleur main image

When, in the mid 1970’s Shimano redesigned its entire middle range of derailleurs, including the Shimano 500, Schwinn had the opportunity to move the Schwinn GT400 Le Tour on a generation to this - the Schwinn GT420 Le Tour. In doing so slightly more steel crept into the design - in the front knuckle.

I think that this was the last model that Shimano produced that was branded as Schwinn - from here on in, Shimano was a brand that was desirable in its own right. Today, of course, Shimano rules the world and Schwinn is viewed as a quaint piece of what Americans call history.

A tidy, competent derailleur.

  • Derailleur brands: Schwinn, manufactured by Shimano
  • Country: USA, manufactured in Japan
  • Date of introduction: 1976?
  • Date of this example: 1978 (two letter date code is ‘CC’)
  • Model no.: GT420
  • Weight: 274g
  • Maximum cog: 28 teeth (Sutherland’s 4th edition)
  • Total capacity: 28 teeth (Sutherland’s 4th edition)
  • Pulley centre to centre: 46mm
  • Index compatibility: friction
  • Chain width: 3/32”
  • Logic: top normal
  • B pivot: sprung
  • P pivot: sprung
  • Materials: aluminium rear knuckles, steel front knuckle, parallelogram plates and pulley cage plates
Schwinn GT420 Le Tour derailleur additional image 01