... Size: Front Wheel: 10",Rear Wheel: 15"4)Max.Rotary Speed: 3800+ -100RPM/s; 5) Controlling system: mechanical system;Transmission ... Assy.: Dana 6)Changable speed: 5grades for advancing, 1grade for countermarching, 1grade for braking; ... 7)Marching Speed: 0.8~5 miles/h; Reversing Speed: no more than 2miles/h;8) ...