Chrome/Molybdenum Sprockets Frequently asked questions:

1. How can a steel sprocket be as light as aluminum? By using less of it! The steel that is used on our sprockets is approximately 5 times stronger that aluminum. In theory, you would only need one fifth the amount of material. In practice we used one third. The result is a sprocket that is stronger and far more wear resistant.
2. How strong is an Ironman sprocket? Each model of sprocket is tested on a fixture that produces 5500 pounds of chain tension over the sprocket. In actuality, the maximum chain tension that an open class motorcycle can transmit is in the range of 1800 pounds.
3. Why does an Ironman sprocket last so long? They are extremely wear resistant because they are made of hardened alloy steel, similar to a chain's roller. Aluminum is a very poor material when exposed to abrasive materials such as mud and sand.
4. Why don't we use "mud cleaning" slots? Mud cleaning slots accelerate tooth wear and their benefit is questionable. These cleaning features on some competitor's sprockets reduce the contact area between the chain roller and sprocket tooth, resulting in much faster wear. We have found that these features offer little or no performance advantages in muddy conditions. 
5. What is the purpose of the nonsymmetrical spokes? The patent pending design on the Dirt Tricks Chromoly sprocket was developed using Finite Element (FE) stress analysis software. As the chain is put into tension under power, the resulting forces to the rear sprocket are attempting to collapse as well as shear the rim from the hub. The unique spoke design provides equally spaced support around the rim to prevent collapse. The angle of the spokes, transfers the load diagonally to the hub, doing so with only compressive stresses to the spokes.