rear derailleur redThe SRAM RED Rear Derailleur has been designed to deliver the performance advantage you've come to expect from SRAM. The derailleur is for 10 speed applications with our Exact Actuation technology for precise, efficient shifting. Speed (RD): 10s Cable pull Ratio: Exact actuation Cage (RD): Mid (WiFLi), Short Max tooth: 28, 32 Color (RD): Falcon Gray Pulley bearings material: Ceramic Cage material (RD): Carbon