... get large torque on mountain road and normal speed on flat road,bridge---shell style Rear axle StyleFull floating, ... Ratio of Main gearboxAssumption Condition:Max engine speed 8500RPM,Max powe 10KW,sub-axle speed 2180RPM,wheel radius 235mm RatioMax Speedfitful road ... 9/3539.7KM/Hourcountry 8/2744.1KM 250cc gasoline engine 2 ...