I have been riding a fuji all terrain bike for quite a while now and the handlebars are beginning to creak. I also have a blue bicycle frame that suits my height better and various parts(but the only ones I want to keep are the wheels, handlebars, and pedals.) I was wondering if it were possible for me to transfer parts and my main concerns are with the chainring, crankset, and brakeset(Levers, pads, etc.). What should I note down? Also I've been looking all over the net to see the purpose of bullhorn bars but haven't found any. Which is better for uphill situations? The drop or bullhorn? Thanks.