The new Dura Ace 9100 pedals are based on the fantastic 9000 version, a true masterpiece by Shimano. These lightweight pedals -just 228 grams- use a carbon body which is connected to a Nickel-CrMo axle. The base of the pedal has a special steel plate designed to protect the carbon body from wear by the cleat. The Dura Ace pedal uses an additional needle-bearing in conjunction with the regular cup-cone bearings. This allows the pedal to spin even more smoothly. Lightweight carbon The Shimano R9100 Carbon pedals are made from a durable and lightweight carbon composite. This is ideal for the weight weenies, who want the lightest possible pedal from Shimano. The shaft of these pedals is also hollow, for optimum weight savings. Durable, quality materials Shimano's Dura Ace pedals are made of carbon, which is of course weaker than other materials. To prevent your cleats from wearing down, Shimano has applied metal plates to the pressure points, so that your cleats wear out before your pedals do. After all, cleats are easier to replace! The shaft of these R9100 pedals is made of a hollow steel construction, in combination with Shimano's very smooth-running cup-cone bearings. A needle roller bearing has also been added in the housing, so that these pedals turn even more smoothly!