So, when you're discussing weight in this thread, is it the usual "How can I make my bike so light it flies like Tinkerbell" concern or are you meaning wheels that will be supportive of riders of varied sizes? The reason I'm asking for clarification is some of the bikes I assemble have weight limits on the boxes and I've had some that were purchased by larger riders come back with bent wheels. Obviously I can't modify the wheels on the bikes in the store but would it be possible to raise the upper limit on a bike by swapping one set of wheels for a different one?