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I see this constant problem with designers and their lack of structural engineering education and thus - lack of structural understanding. I see design concept after design concept that is clueless regarding basic structural requirements for it to function as designed. The above bike is structurally weak. There's a reason traditional bikes have followed a multi-membered frame design - with either rectangular or triangular frame structure between the wheels - for strength. Put a 250-300lb American on this bike and it will suddenly have a new feature - it will be a folding bike. Mr. Starch needs some basic engineering courses.