50T Potenza Silver Chainring + Screws 11S FC-PO050S 2007 FREE shipping within Australia over AU$100.00 In stock. Available via Buy Online Only Share Loading Facebook Like button... 50T Potenza Silver Chainring + Screws 11S FC-PO050S 2007 FREE shipping within Australia over AU$100.00 In stock. Available via Buy Online Only Share Loading Facebook Like button...