Extensive engineering and finite element analysis have been employed to maximize strength from this net forged 6066 alloy crank while keeping weight as low as possible their patented i lock crmo steel inserts give this crank dh strength at the critical pedal interface race face middle weight am bb spindles are stronger than some of their competitors39 dh spindles with the exi spline interface ensures fast simple installation and easy serviceability extended spline interface length on t