The DURA-ACE RD-R9250 12 speed Di2 electronic rear derailleur 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 shifts cassettes from 11-30 to 11-34 bringing new versatility to the world's best road component group.
Compact SHADOW design includes an integrated wireless unit, charger, switch and LED status indicator.
Wider range capacity: compatible with 11-30 and 11-34T 12-speed cassettes
Fastest ever rear shifting, 58% faster than RD-R9150
Integrated D-FLY Connectivity
Maximum low sprocket: 34T
Attributes
Max Front Difference
16T
Maximum Cog
34T
Minimum Cog
11T
Primary Color
Black
Cage
GS
RD Weight
215g
Speed
12
Mount
Standard
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Specs
Size
Metric
Imperial
This is a size chart.
Geo
Metric
Imperial
Geometry of this bike.
Reach
Horizontal measurement taken from the middle of the bottom backet to the middle of the headtube.
Stack
Vertical measurement taken from the middle of the bottom bracket to the middle of the headtube.
Effective Top Tube
Horizontal measurement taken from the middle of the seatube to the middle of the headtube.
Actual Top Tube
True length of the top tube taken from the seatube along the toptup to the headtube.
Standover Height
Vertical measurement taken from the ground to the the middle of toptube.
Seat Tube Angle
Angle of the seatube.
Seat Tube Length
Lenght of the seat tube taken from the bottom bracket to the top of the seat tube (the measure is taken alongside the seat tube)
Headtube Angle
Angle of the headtube.
Headtube
Vertical lenght of the headtube.
Chainstay
Horizontal measurement taken from rear axle to the bottom bracket.
Wheelbase
Horizontal measurement between the two wheel axles.
BB Height
Vertical measurement taken from the ground to the bottom bracket (Never taken at sag).
BB Drop
Vertical measurement between the height of the axles and the height of the bottom bracket.
