My .02... I am 5' ( on a good day) I lowered and raised my bike. It feels completely different when riding. I raised it up for many reasons, mainly due to how it handles. Brian is right you need to change all three, roaring toyz sells a kit and so does Brock's Performance. To avoid lowering try the following, buy riding boots/shoes with a thick sole then insert gel insoles ( I use 2 one full one heel only, stacked) this added a good 1.5-2.0" to my height. Good luck and watch for low spots on the road.