With the fastest shifting operations in the largest DURA-ACE gear range to date, the RD-R9250 derailleur from SHIMANO opens up opportunities for victories or chances for personal best times. The DURA-ACE RD-R9250 derailleur features an integrated charging port and a unit for wireless signal transmission, enabling super fast and precise shifting operations. With just one cage length, the derailleur shifts on cassettes up to 11-34 teeth, further increasing the versatility of the world's best road bike component group.