Shimano Dura-Ace Di2 RD-R9250 12 Speed Rear Derailleur ZIPPMARCH honed by 80 years of

honed by 80 years of metalworking and race-winning experience

Its wider position on the bike also provides clearance for extra wide tyres

Progressive sipe angle pattern increases cornering grip

The new Record™ 12x2 Speed crankset can be installed on any type of frame

This is the overall spindle length with all spacers and adjusters removed from the spindle

Shimano Dura-Ace Di2 RD-R9250 12 Speed Rear Derailleur ZIPPMARCH honed by 80 years ofThe 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