заводские горный велосипед оптовая двойной дисковый тормоз складной горный велосипед для взрослых student переменная скорость автомобиля

material consulting customer service item no. consulting customer service frame structure consulting customer service processing customization no brand junying folding no propulsion mode chain model consulting customer service load 120kg brake system consulting customer service frame type soft tail frame front fork type spring fork (low-end no damping) configuration level standard pedal type beaded pedal brake type front and rear wheel v brake color red blue green size single speed 18-inch singl