The FU40 is the the result of years of refinement and iterative improvement. By refining the shape, and utilizing variable butting, high grade alloys and advanced heat treatment techniques, we have increased the fatigue life many times of the ISO industry standard. So much so, that we’ve seen fatigue test results reach over 1 million cycles. This creates not only a strong, reliable bar, but one that feels great with a balance of flex and control for the best ride possible!