T.A. Ref 173 Professional Adapter: 3-Pin Pro 3 Attaches to 6-Bolt 152mm Criterium Rings
This rare adapteur bolts on to a 3 bolt TA "Pro 3 Attaches" crank arm (or other 116mm 3 bolt crank) and allows for use of TA's 6 bolt "criterium" chainrings (Ref 204 & 206).
Excellent used condition. Could use a polish if it's going on a show bike, but no damage.
- 116mm to 152mm 6 bolt