Under hard effort, the Pinarello F3 105 Di2 Road Bike holds a low, race-tuned position that keeps power moving efficiently into the pedals on a climb and stays settled through the descent. T700 carbon fiber underneath stays stiff and responsive through that effort, while still taking the edge off rough pavement rather than transmitting every bit of road buzz. What Our Gearhead(R) Experts Are Saying:"I've pushed a front shift mid-climb on 105 Di2 without the drivetrain hunting for the right gear or hesitating for a beat. That's the consistency electronic shifting is supposed to deliver, and it's the reason I'd point someone toward Di2 over mechanical."Heads up! We do our best to keep bike specs and images current, but occasional component changes can happen without warning, and sometimes the photos might not show the exact build you'll receive. If you want to double-check the details, our Gearhead(R) Experts are always here to help.