The line between dirt and freestyle is blurred these days. When you need a bike that does it all, hop on GT's Slammer. It starts with a tough steel frame and fork, 3/8-inch axles, and 3-piece cranks so it can handle ramps, ledges, and urban landings. The stout 36-spoke wheels don't hurt, either. And, since the world is your bike park, you've got a single rear brake cable for a super clean and versatile setup.