... 1, light weught and small size 2,material: magnesium alloy 3,li-battery 36V, 7/8/9/10 ... A MATERIAL:magnesium alloyFOLDING SIZE640X280X810mmEXTENDED SIZE1255X490X1090mmWEIGHT≤23kg (including battery)MAX ... IT UP.3, THE BIKE IS MAINLY USE MAGNESIUM ALLOY, ANTI CORROSION, ANTIQUAKE, with tenacity.4,A ... , CANE BE PUT INTO TRUNK Magnesium alloy electric Foldable Bike with lithium battery