Build a 12-speed Di2 Time Trial / Triathlon bike
Building a 12-speed Di2 Time Trial (TT) or Triathlon bike isn't as straightforward as you might think. What components can you use, and how do you connect them?
Time Trial/Triathlon Dual Control Lever
Ultegra ST-6871
The TT/Triathlon Dual Control Levers ST-6871 allow the rider to change gears and operate the brakes when using the TT/Triathlon extensions.
Each shifter has two buttons, and they're not 12-speed compatible.
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These shifters are compatible with carbon fiber handlebars (but only with aluminum inserts where the brake levers are installed) or aluminum handlebars. The handle inner diameter is 19.0 – 22.5mm and the handle outer diameter is 22.2 – 24.0mm.
Note that carbon fiber handlebars without aluminum inserts (where the brake levers are installed), cannot be used.
Specifications
- Model code: ST-6871
- Series: Ultegra (6870)
- Weight: 74g (per lever)
- Speeds: 10 / 11
- Number of switches: 2
- Wire length: 450mm
- SD50 ports:
- Connector: SD50
- Mount: 19.0mm - 22.5mm
- Reach adjust: Yes
- Brake type: Rim
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Manuals & other documents
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