The White Ind cranks are machined from billet rather than cold forged. The cold forging process increases the mechanical strength of the crank arm and spider making a much more stiff and durable design. The manufacure of such an item is doable in the US, it's just that the cost of tooling and process development to optimize the fabrication sequence is a big cost hurdle to overcome. The other issue is market, as the big 3 have pushed the crank bottom bracket design away from square tapers. The square taper crankset is really a niche market. ~mike
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