T.A. Ref 175 Cyclotouriste Professional Adapter: Pro 5 Vis to 6-Bolt 152mm Criterium Rings (Near Mint)
This rare adapteur bolts on to a Pro 5 Vis Cyclotouriste 50.4mm crank arm (or Stronglight 49D, Velo Orange Gran Cru) and allows for use of TA's 6 bolt "criterium" chainrings (Ref 204 & 206).
These adapters were developed in the 1960's in response from racer's need for easier chainring changes on the course. With this adapter, a racer could change their rings without removing their pedals.
Near mint lightly used shape. Show bike worthy.
- 50.4mm to 152mm 6 bolt