The Shimano Dura Ace Di2 ST-R9180 shift/brake lever paired with the BR-R9270 disc brake caliper represents the pinnacle of triathlon and time trial performance.
Engineered for athletes demanding absolute precision, this wireless shifting system delivers uncompromising control and responsiveness when every millisecond counts. The Di2 electronic shifting eliminates cable friction, ensuring instantaneous gear changes with minimal effort—critical during high-intensity efforts where hand fatigue can compromise performance. The clean, minimalist cable routing enhances aerodynamics while reducing mechanical complexity and maintenance demands. The BR-R9270 hydraulic disc brake provides superior modulation and stopping power in all conditions, giving you confidence on technical descents and during aggressive braking zones. Combined with the ergonomic lever design, this setup allows seamless transitions between shifting and braking without repositioning your hands. Purpose-built for endurance racing where consistency and reliability matter most, this left-side unit integrates seamlessly into a complete Dura Ace Di2 groupset for a cohesive, high-performance drivetrain.
Features
- Optimum power transmitted with firm grip
- More aerodynamic and better grip feeling
- Switch button integrated inside without hand release
- Intuitive shifting control
- Keep firm grip when shifting
- Single button on each side of the shifting lever only works with SHIMANO SYNCHRONIZED SHIFT
- Better control and confidence in race conditions
- Customizable function to fit in rider’s riding style
- Each switch has the option for multi-shift ON or OFF
- E-TUBE PROJECT
- Clean cockpit area
- Integrated E-TUBE cable and internal brake cable routing
- New cable junction (EW-RS910, EW-JC130) available to integrated with bike frame
Specification
-
Use: Triathlon/TT
-
Group: Dura Ace Di2
-
Model: ST-R9180-L
-
Type: Dual-Control-Lever
-
Handlebar mounting: DH Bar left
-
Gear front: 2-speed
-
Optical gear display: No
-
Lever reach adjust: Yes
-
Clamp band inner diameter: 19.0-22.5mm
-
Brake-type: Hydraulic Disc Brake
-
Brake caliper: BR-R9270
-
Brake mounting: Flat-Mount
-
Brake pads: L03A Resin with Fin
-
Brake hose: SM-BH90-JK-SSR front 1000mm (shortable)
-
One-Way bleeding: Yes
-
Brake fluid: Mineral oil
-
Recommended brake rotor: SM-RT900 (140mm/160mm)
-
Compatible electric wire: EW-SD50
-
E-tube Project: Yes
-
E-tube port (pcs): 1
Material
-
Body: CFRP
-
Lever: Carbon, painted
-
Caliper: Aluminium
Colour
Contents
- 1 x Shimano Dura Ace Di2 ST-R9180 STI Dual Control Lever left
- 1 x Shimano Dura Ace BR-R9270 Flat-Mount Disc Brake Caliper
- 1 x Flat-Mount Adapter 140mm/160mm
- 1 x Brake Pads L03A-Resin with Fin
- 1 x Brake Hose SM-BH90-JK-SSR 1000mm (shortable)
- 2 x Screw for brake caliper
- 1 x Tube Joint Kit
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.
