Shimano Dura-Ace Di2 RD-R9250 12 Speed Rear Derailleur SCV Kit includes: 1

Kit includes: 1

Choice of 1-1/8" or 1-1/4" (select from drop-down)

Dimension: M8 x 10

the patented breakaway peak will snap away from the helmet

Now simplified with a single derailleur cage length

Shimano Dura-Ace Di2 RD-R9250 12 Speed Rear Derailleur SCV Kit includes: 1The Shimano Dura Ace Di2 RD R9250 12 Speed Rear Derailleur represents the pinnacle of electronic road shifting. Developed for WorldTour racing and engineered for uncompromising performance, the RD R9250 delivers Shimanos fastest, most precise rear shifting ever. Featuring a semi wireless Di2 design, integrated wireless connectivity and intelligent system management, it provides lightning fast gear changes under full load while maintaining the