For years I've saved a TT with a channel iron frame extension and semi elliptic springs,like modern trucks. It has Dayton type demountable dual rims and steel centers on the front with dayton rims. The wheelbase is 4 feet longer. Thesearch here says it is a Kalamazoo conversion,but nothing comes up on a websearch. Anyone here have info or want to part me from it. Hate to ship it to China.