Shimano Dura Ace RD-R9250 Di2 2x12-Speed Rear Derailleur Brand_Wahoo RATCHET LN The reliability of

RATCHET LN  The reliability of the Ratchet System comes from the fact that each tooth engages simultaneously

139 g lighter than PD-GR500

Steel (round and bladed)

Maximum rim and tire protection

Shimano Dura Ace RD-R9250 Di2 2x12-Speed Rear Derailleur Brand_Wahoo RATCHET LN The reliability ofDURA ACE Di2 Rear Derailleur SHIMANO SHADOW RD 12 speed RD R9250 Our fastest ever shifting across SHIMANO's widest ever DURA ACE gear range, the RD R9250 is capable of both race wins and personal bests. The DURA ACE RD R9250 integrates the system charging port and a wireless connectivity unit all while delivering super fast, precise shifting worth of any podium. A single cage length that is compatible with 28 34T low sprockets brings new versatility