... you pay it.For the wheel size, we have 10",12", 16", 17",20", 24", 26", 28" available, please advise us ... hub motor Dimension of the tire: For 12" wheel, the tire size is 2.125; For 16" wheel, normally we send size ... not fit your e-bike. Motor Performance: 36V250WDimention520mm*380mm*190mmWheel2.125-12Brake systemFront/Rear disc(drum)/drum brakeColorBlack/Silver-whiteVoltage36,48 ...