The design of the parts are perfect, but you do need to read the instruction carefully so that you can pick the right steps. the instruction is for all types of bikes of this brand. You need to use the tools come with it so that you do not use too much force to damage the threats. The brakes have been adjusted when you open the box, but the hand bar, the seat, and the front wheel do need to be tight enough using the tools coming with it. The hook of the washer for the front wheel must be fitted into the corresponding hole. Do not turn the inner nuts of the front wheel, They are adjusted just right for the bearing inside. I used to do a lot of such adjustment when I was young. I think this is a great bike for this price.