1. Aluminium alloy frame 2. SHIMANO 6 speed gear 3. Foldable 4. Low price ModelSpecificationsBY-EB05Frame6061 Aluminum Alloy ... (16mile/h)Range50km(32mile)BrakeV-brake(F/R)DerailleurShimano 6-speed gearsWheel size20*1.75N.W/G.W20kg/23kgBattery weight3kgDimension1530*600 ... *400*760mmOptional colorsBlack, White, SilverContainer capacity100units/20ft,219units/40HQ 250W Max. speed 25km/h electric bike