I've converted my 1995 KLX250R for the road. One of the last things to do is replace the very aggressive knobbies with something more appropriate for the road. I was going to buy new tires and swap them out myself but then I was wondering if I should have the wheels balanced. I get a slight bounce/vibration in the front while on the road. Assuming its the knobbies but could it also be an unbalanced wheel? Any suggestions on tires too? Rear is 18", front 21". Thanks.