Up for sale is BRAKING 2014 Ranger Crew 570 [Fullsize] Polaris BATFLY OVERSIZED ROTOR POL. The vendor part number is BY9018. Please read the title to know what is for sale Exclusive patent for BATFLY channeled discs BATFLY grooves help ventilation and cleaning of the disc Increased thickness and Improved thermal stability Structural resistance enhanced by up to 20%