On the Suburban (or any of the older Schwinns) I'm curious as to what the most significant factor is in the weight? Is it a super heavy frame by comparison or is it just everything together? Would a Suburban frame make a good candidate for a fixed gear (if you swapped out the wheels) or is the frame weight and geometry just not conducive to anything other than upright cruising? Pardon the newbie questions... but my status says I'm allowed
