Find quality Electric Bicycle Brushless Hub Motor 3.high efficiency 4.good price 5.depends on your requirments Please advise us it is the rear wheel or the front wheel you need after you pay it.For the wheel size, we have 10",12",14", 16", 20", 24", 26", , 28" available, please advise us the size of the wheel you need.For the brake we normally send you with drum, if you need a disc brake, please ...