Staying tucked in your aero position while managing gear changes is the fundamental challenge of time trial and triathlon racing. The Shimano Dura-Ace ST-R9160 Di2 levers mount to the ends of your base bar, putting brake and shift controls exactly where your hands naturally rest when you're not in the aerobars. You get braking power and gear access without sitting up and throwing away seconds of hard-won aerodynamic advantage.

These levers work exclusively with Synchronized Shift, which simplifies the interface to a single button per side. One button shifts toward an easier gear, the other toward a harder gear, and the Di2 system handles front derailleur changes automatically based on your current position in the cassette. This setup eliminates the cognitive load of managing chainring shifts during race efforts when you're already redlining. Hold the button down to shift through multiple gears at once for bigger jumps when the terrain changes suddenly.

The lever blades are carbon fiber, the bracket bodies are carbon composite, and the expanding wedge clamps are alloy. This material mix drops weight compared to previous-generation TT levers while maintaining the stiffness needed for confident braking. The brake pivot position is optimized for Shimano's Super SLR brake calipers, and reach adjusters let you dial in lever position to fit your hand size.... Read More