AllisChalmers Model M crawler | Heritage Machines
Dec 3, 2020 · The Model M had a 40in tread centre and 12in track shoes; narrow enough for 8ft and 12ft rows, and suitable for many row crops. The Model WM, however, was designed with hilly terrain in mind, with its wide tread providing greater stability and traction on steep terrain. With 50in tread centres, 12, 14, 16, 18, 20 and 22inwide track shoes were ...