I have some 1 and 1/2 tubing that I cut from thr neighbors trampoline. I'm thinking the bike would be a lot lighter if I replaced the top tube, down tube and the bottom tube. Most of the weight is on the rear wheel, Another modification will be to the seat, one has already broken off. My wheel base is 52 inches, I am thinking about streaching it to55 inches. When I made the jig, I didn't plan on making it any longer. I think Schwinn made a larger one that was about 58 inches but I'm too lazy to look it up. The chances of finding one aren't very good. Any how your bike looks good, building is as much fun as riding. good luck