CeramicSpeed Oversized Pulley Wheel System for Compatible with Shimano Dura Ace 9200/Ultegra 8100 - Coated Races, Alloy Pulley, Carbon Cage, GoldThe CeramicSpeed Oversized Pulley Wheel System provides optimization and increased efficiency of the rear derailleur through its extremely low friction bearings and unique overall design. Product Specifics Defined Color: Gold Drivetrain Speeds: 12 Fits Brand: Compatible with Shimano Fits Model: Dura Ace R9200 Series Fits Model: Ultegra 8100 Series Largest Cog: 34 keyword search: OSPWS Today's Stock Status Currently not available UPC: Not available