Oh, no question: crank, derailleur, brakes, stem, handle bars, seat post, wheels, kickstand, pedals. But then it would no longer be a $40 bike off CL unless you have all these in lightweight components just lying around in a box. The bike will last forever but it still weighs a ton. I still have a Schwinn LeTour in the basement that I bought when I was 14 and rode that thing thousands of miles including some treks through the Green Mountains with 10000 feet of elevation in a day's ride. It's still in perfect shape.