I did not see you mention that you've been to a bike shop so if you haven't already that is your first stop. Visit bike shops in your area. Do not shop at Target or Walmart for a bike. It's low quality product and put together by some stock boy that doesn't know anything about bikes. If you work with a bike shop they are the professionals who can find what you need and it will be assembled by someone who knows what they are doing. Good luck and let us know how it turns out!