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Carbon Fibre

Stainless steel & enamel

Stainless steel & concrete

Titanium & Tungsten

Silver and concrete

Some cool concepts, there. I couldn't do the carbon fibre... it screams "ricer" or "weight weenie cyclist". If I were a civil engineer, I'd go with the steel-and-concrete for sure, but I'm most drawn to the enamel ones, right now. Thanks for pointing out that site!