TA Professional REF P209 Track Chainring: 6-Bolt - 1/8" - 52t - 152mm (used)
This is a tough to find 6-pin pista chainring, to fit on a "professional" adapter. The adapters were either REF. 173 for 3 bolt crank arms, or REF. 175 for 5 bolt cranks. The purpose of this was to allow for easy chainring switches without removing pedals, as this was in the 1960's when most TA chainrings had too small an opening to fit over pedals (like the Pro 5 Vis rings).
Excellent lightly used shape, in original bag. Teeth show minimal wear. Light scratches throughout.
- BCD: 6 bolt, 152mm