The moment of inertia of an object about a given axis describes how difficult it is to change its angular motion about that axis. Therefore, it encompasses not just how much mass the object has overall, but how far each bit of mass is from the axis. The further out the object’s mass is, the more rotational inertia the object has, and the more rotational force (torque, the force multiplied by its distance from the axis of rotation) is required to change its rotation rate. The Deda REVERSE INERTIA system cuts 37,1g from the outermost part of the wheels, the rims, which most affect the moment of inertia. That mass has been concentrated as close as possible to the hubs, the area closest to the axis of rotation, where the moment of inertia approaches zero.
The hubs, at the same time, have been built to be as light as possible, through the usage of small but high durability bearings, the lightest material a
Modern chemical technologies allow engineers to play with polymers, teaching them what to do, when and how. The special formula resins used for the combined 3K and UD carbon structure of the Deda rims is composed by polymers particularly resistant to high temperatures.
Deda wheels have been tested applying the brake lever with 120kg for 30 minutes. The basalt fiber brake surfaces reached almost 200 °C, but the clincher rims didn’t fail.
Special design washer inside the rims positioned just under the spoke head and a special design of the rim profile allow the spoke to get perfect alignment. This solution makes the spoke life longer and the wheel more reliable, since the spoke works in its ideal position. The tension of the pulling efforts on the spoke is perfectly aligned with the spoke axis. Each spoke bears around 130kg, from the rim straight to the hub.
The force exerted by the brakes on the wheels causes a rise in temperature of the rims which in turn leads to a higher risk of failure. Deda rims have been developed to overcome this problem: the brake surface is wider than those of normal rims. This solution allows for a distribution of the exertion of the brake force on a wider surface and also produces a greater dissipation of heat. The development of the special larger brake pads, Big Pad, also aids in dissipating heat and its design facilitates the dispersion of water and dirt, which is also critical in guaranteeing a better and safer brake. Deda wheels are compatible with the brakes on the market and offer different possibilities of assembly: close to the rim, for those riding on flat planes, close to the most internal diameter brake surface, for those riding uphill.
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