Stay aero and in command with the Shimano Ultegra Di2 ST-R8060-L — a left-hand base-bar dual control lever built for time trial and triathlon riders who refuse to compromise between speed and control. It pairs wired Di2 electronic shifting with a rim brake lever in a single, low-profile unit so you can shift gears and scrub speed without lifting your hands from the bars.

Highlights

  • Dual function base-bar lever: brake and shift from the cockpit without moving off the aero position.
  • Di2 electronic precision: light, consistent gear changes with a single-finger button press every time.
  • Aero-focused design: slim, low-profile body shaped to reduce frontal drag on the TT cockpit.
  • Reach adjustment: dial the lever position to suit your hand size for a secure, comfortable grip.
  • Wired Di2 reliability: SD50 e-tube connection provides stable, weather-resistant electronic communication.
  • Synchronized Shift compatible: single button automatically manages front and rear shifting together for seamless cadence transitions.

Built for the aero cockpit

The ST-R8060-L mounts directly to the base bar of your TT or triathlon bike, giving you full braking and shifting control from the cockpit. The compact body keeps the front end clean and fast while remaining easy to operate under race pressure. Reach adjustment lets you position the lever blade precisely, so braking force is always right where you need it.

Effortless Di2 shifting

Electronic Di2 actuation delivers consistent, repeatable gear changes with minimal button effort — no cable tension to account for, no missed shifts under load. When Synchronized Shift is enabled in your Di2 system, this single-button lever manages front derailleur changes automatically as part of a coordinated shift sequence, letting you focus entirely on holding power and position.

Compatibility & Fit

Series: Shimano Ultegra Di2 (R8050). Left-hand lever. Designed for 2x11-speed Di2 drivetrains; compatible with 12-speed Di2 systems when updated to firmware version 3.3.0 or newer. Rim brake actuation — in the Australian setup the left lever operates the rear brake. Wired Di2: connects via SD50 e-tube port; requires a compatible Di2 battery such as the BT-DN300. Base-bar clamp band fits handlebar inner diameters of 19.0–22.5 mm. Single button shifts the front derailleur when Synchronized Shift is active. Sold as a single left-hand lever only.

Shimano offers a limited warranty covering defects in materials and workmanship. For warranty support, return the item to Tune Cycles.
  • Combines Di2 electronic shifting and rim braking in one base-bar lever for full cockpit control
  • Electronic Di2 actuation delivers light, precise, repeatable shifts with minimal button effort
  • Low-profile, aerodynamic body designed to minimise drag in the TT and triathlon cockpit
  • Reach adjustment for a personalised lever position and confident braking feel
  • Wired Di2 via SD50 e-tube port — stable, weather-resistant electronic connection
  • Compatible with Synchronized Shift for seamless, automated front/rear gear coordination
  • 11-speed native; upgradeable to 12-speed Di2 compatibility with firmware 3.3.0 or newer
  • Clamp band fits base-bar inner diameters 19.0–22.5 mm
  • Sold as a single left-hand lever
Part NumberST-R8060-L
SeriesShimano Ultegra Di2 (R8050)
HandLeft
Speed Compatibility2x11-speed (12-speed with firmware 3.3.0+)
Shifting SystemDi2 electronic (wired)
Brake TypeRim brake (mechanical)
E-tube PortSD50 × 1
Buttons1 (front derailleur / Synchronized Shift)
Reach AdjustmentYes
Clamp Inner Diameter19.0–22.5 mm
Weight (per lever)69 g
Intended UseTime Trial / Triathlon (base bar)
SKU SHM-ISTR8060L
Barcode # 4524667762621
Brand Shimano