Dura-Ace R9250 Di2 Rear Derailleur Gravel moderately stiff R4 sole and

moderately stiff R4 sole and single Boa closure

offers 7 combined solid and flash output modes- from the highly disruptive max 400 lumens emitted in Day Flash mode to the impressive 80 hours of runtime in FEMTO mode

24'' to 700C

The Drivetrain Kit™ brings you three of our most popular products in one convenient cleaning kit: The Grunge Brush™

20mm front

Dura-Ace R9250 Di2 Rear Derailleur Gravel moderately stiff R4 sole andThe 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 to the world's best road component group. . Features Ultra fast rear Di2 shifting Compact design includes an integrated wireless unit, charger, switch Wider range capacity Max. low sprocket: 34t CFRP rear