Look takes system integration and ride comfort to new levels with their 675 Light Ultegra Di2 Bike. This is an endurance geometry tuned for stiffness and precision up front and comfort in back in a frame that goes under the 1,000g barrier thanks to smart use of carbon, including an all-carbon BB86 bottom bracket shell. This is the frame the Cofidis team chose to ride Paris-Roubaix on, and when you take a good look, you'll understand why.

Look is big on integration. It takes work to get all the pieces right, but the advantage is that once you have it, you have greater control over the ride. Where this is paramount is with the stem. The A-stem sits flush with the top tube, which, in itself, increases steering precision and out-of-saddle stiffness as well as aerodynamics. The stem is also adjustable with 30-degrees of angle adjustment, from –15 to +15, just by flipping the stem. There is also room to add 5mm of stack under the stem, or remove 5mm of stack if you want to get really low. Stems are sized to the bike, but can be changed.

The stem works with the tapered 1 1/8" to 1 1/2" steerer and fork crown to continue the precision all the way down to the front axle. This is great for control and piloting, giving you a full-on road racer ride in the front.

The Selle Italia saddle is clamped to the bike via a Look 27.2mm diameter carbon-fiber seat post. Here, too, the size and the material works with the frame to provide a comfortable ride. The post's interior is designed to fit an internal Shimano Di2 battery, which is where it resides.