Carbon fiber, titanium and class-beating drive motors A manual rear derailleur release system makes it possible to move the rear derailleur manually into the desired position in the event of a system malfunction The world`s best electric motors ensure effective shifting even under strain, deliver the same performance time after time and make extremely fast, precise shifts possible The `Magnetic Hall Sensor Resolver` ensures that the rear derailleur always moves the chain into the ideal position for the selected sprocket Upper and lower body are formed from monolithic carbon powder technopolymer while the front plate and cage are carbon fiber for the perfect balance of weight and durability Exclusive Multi-shift system allows the rider shift up or down by up to 11 sprockets in a single action RD19-SR12EPS 12sp 32 Mid CRBN 198gUPC/EAN/GTIN: 8053340450020