The frame is very heavy hi-ten steel and most of the components are very heavy steel as well. Components like the seatpost and stem are cheap stamped pieces. The fork on mine was defective and had to be replaced. The wheels are heavy and cheap with junk hubs. By the time you replace everything, you will have spent enough to buy a much much better bike like a Wabi Classic, and still have a heavy bike due to the frame. You are trying to upgrade a turd.