Campagnolo's hidden-arm crankset is a signature piece of the giant of Vincenza. It's a simple, practical design that is unique in the component world. It's lightweight, beautiful, and strong, signifying all that Campagnolo stands for. Campagnolo has further refined the design, making the Super Record 11 Ultra-Torque Carbon Crankset lighter and improving the shifting.
A quick glance reveals nothing, so let your eyes linger on the chainrings first. The 53/39 and 50/34 rings you see are still round, but take a look at the shifting pins. There, you'll find first sign that the rings have been re-engineered for faster shifting. Campagnolo calls this their XPSS, eXtreme Performance Shifting System. There are now eight dedicated sectors for upshifting, with ramps and pins working in conjunction with a new tooth profile. But up is only half the story. They've also optimized two new down-shifting sectors, with the new tooth profile working with ramps on the way down as well.
In terms of simplifying, they've removed the chainring nut from the chainring fixing equation. The rings are held to the crankset by five alloy bolts that go through the big ring and thread directly into the small chain ring -- easier and lighter.
Then they turned their attention to their Ultra-Torque bottom bracket spindle. They relieved some metal from low stress areas to lower the overall weight without sacrificing either stiffness or fatigue life.
All told, the smart redesign has yielded a weight savings of 15g with no other loss anywhere in the equation.
The Campagnolo Super Record 11 Ultra-Torque Carbon Crankset has unidirectional Carbon-Fiber crankarms with Dark Grey anodized chainrings and Black bolts. Campagnolo ceramic CULT (Ceramic Ultimate Level Technology) bearings are installed on both arms. The available chain ring options are a standard (135mm bolt circle diameter) with 53/39 rings or a compact (110mm bcd) with 50/34 rings. Crankarm lengths are 170, 172.5, and 175mm.