The first thing you need to know is that there are two basic levels of mountain bikes. The first is the entry level mountain bike. These run between $300-$700 from your local bike shop. The other group is the custom or professional mountain bike. These specialized bikes will run you anywhere from $800 up to $8,000. First, we will look at the procedures for fitting you into an entry level bike. Then we’ll see how a custom bike fitting differs, and finish with a discussion of how to choose which type of bike is right for you.