rear derailleur force wifli medium cage max 32tThe SRAM Force Rear Derailleur takes advantage of Exact Actuation, an actuation ratio that delivers precise 3mm shifts in every gear along with the widest range of adjustment available, delivering the best 10 speed performance in the sport. Speed (RD): 10s Cable pull Ratio: Exact actuation Cage (RD): n a Max tooth: 28, 32 Color (RD): n a Pulley bearings material: Steel Cage material (RD): Carbon Weight (g): 178