This electric bicycle has adopted a new technology of dual disc brakes to ensure more stable and safe riding. The 4-inch tires are wider than normal tires and are slip-resistant, and puncture-resistant. Adjustable handlebar seat fits riders 5.5 - 6.5 ft. The Euy F6 electric bicycle can be used for work and travel, with a 30-degree climbing ability. The built-in 48 V 18 Ah lithium battery can last 40 miles in electric assist mode. It is the king of 20" electric bikes because of Shimano professional gears, folding lightweight, and double shock absorber performance.