30392 bike assist products are offered for sale by suppliers on Alibaba.com, of which electric city bike accounts for 31%, electric hybrid bike accounts for 21%, and electric bicycle kit accounts for 5%.
A wide variety of bike assist options are available to you, such as front and rear wheel v brake, v brake and disc brake.You can also choose from lithium battery, lead-acid battery bike assist,as well as from aluminum alloy, steel, and aluminum bike assist, and whether bike assist is rear carrier, down tube, or integrated battery.