There are inherent vulnerabilities of die cast and metal spoked wheels. Everyday use requires that a wheel handle some rough treatment without dents and without bending.
Not all wheels are up to this, The solution? Invent a new material. Kesonite is a strong, dense metal/resin composite. It holds its shape better than metal and it's stronger than a spoked or die cast wheel. The weight of the wheel makes it easier to use and more accurate on rough terrain.
Based on the design of the RR Series Large, a model with over 20 years of continuous improvement, including wheel design, material, and safety reflector!