The Simplex SX 610 GT rear mech is a long cage touring model from the early 80s and was specced on many a mass-produced French randonneur. With a large total tooth capacity thanks to the long cage and the ability to tackle a 36 tooth large sprocket this is a great way to keep a bike period correct whilst allowing yourself some easier gears. The mech is fitted with Simplex’s direct dropout bolt system which means that it can also be used on bikes with missing, or damaged mech hangers.
- Model: SX 610 GT
- Available from 1983 to 1985
- Weighs 344 grams
- 38 teeth total capacity
- 36 tooth maximum cog size
- Suitable for 4, 5, 6 or 7 speed clusters with a 3/32″ chain
- Made in France
- With original box and instructions