It takes a degree of passion for the sport that can’t be faked to fully appreciate sram red. It was created to blur the boundaries between machine and athlete. The sram red rear derailleur was designed with our exact actuation™ technology for precise efficient shifting. Carbon fiber titanium and ceramic bearings complete the spec. The result adds to its legacy as the heart of the purest groupset for the pursuit of cycling excellence. - speed (rd): 11s - cable pull ratio: exact actuation - cage (rd): mid (wifli) short - max tooth: 28 32 - color (rd): falcon grey - pulley bearings material: ceramic - cage material (rd): carbon