julio 28, 2026Publicado Por En julio 28, 2026Vintage Shimano Biopace 52T Chainring 130 BCD 5-Arm NOS Oval 600 UltegraBiopace oval profile with computer designed drive system graphic and anti-drop positioning pin, marked "Shimano Biopace 52" with MB code. Teeth show no chain wear, with only light surface marks from handling.
