When you increase Diameter and decrease Weight of a shaft, you increase its Critical Speed. The Critical Speed of a rotating shaft is the speed in which it begins to operate with strong resonant vibrations and becomes unstable. In terms of a Sprint Car Drive Shaft,

this is when the drive shaft starts to turn into a vibrating jump rope,

which typically leads to premature U joint failure.

Titanium is extremely Forgiving, as its fatigue resistance and

High Tensile Strength makes for a properly designed Drive Shaft.

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AL Driveline's Titanium Drive Shafts have the perfect balance of

Weight, Strength and Forgiveness of any drive shaft available, PERIOD