use lg battery bicycle assisted electric r3 folding 48v lithium national mountain bike standard cross-country 26-inch, Silver;blue

frame 26-inch four-link aluminum alloy frame front fork aluminum shoulder iron legs mechanically lock the front fork bottom bracket sealed shaft gear plate haomeng ac49 three-level chainring variable speed 21sp pedal half aluminum folding pedal motor 48v250w/500w/800wbrushless motor battery built-in 10ah lithium battery/lg 12.8abattery tire cst 26*1.95 meter s866 liquid crystal instrument power five step power brake mechanical disc brake, brake off transmission tx30 f...