2x12 Crankset

2x12 Crankset

105 FC-R7100

The 12 speed 105 Crankset is available in a couple of different crank lengths, from 160mm to 177.5mm.

It weighs 765 g,

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There are two different chainring options:

  • 52 x 36T (not at launch)
  • 50 x 34T


  • Model code: FC-R7100
  • Series: 105 (R7150)
  • Weight: 754g (50-34T)
  • Speeds: 12
  • Chain line: 44.5mm

Related components

View the Shadow Rear Derailleur (12 speed) (RD-R7150)


Shadow Rear Derailleur (12 speed)

View the Disc Brake Dual Control Lever (Wireless) (ST-R7170)


Disc Brake Dual Control Lever (Wireless)

View the Front Derailleur (FD-R7150)


Front Derailleur

View the Internal Battery (BT-DN300)


Internal Battery

Related pages

Read Building a 12-Speed Di2 Road Bike - components and wiring
12-Speed Di2

Building a 12-Speed Di2 Road Bike - components and wiring

Building a 12-speed Di2 bike involves a couple of steps and decisions to make. Are you building a rim brake bike or a disc brake bike? Will you connect the shifters wired, or run them wireless? What cables and what length do you need? I'll guide you along the process.

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