This is where it all began, 40 years ago - Polisport started building aftermarket parts so that everyone could enjoy their bikes without worry and with even better looks and improved performance. Performance plastics kick-started its success and are still the core of Polisport. Replacement Full Disc Cover for use with the Polisport Bottom Fork Protector. High impact and abrasion-resistant plastic guard. Fits all Polisport Bottom Fork Protectors (sold separately). Sold individually.