Adult BMX bike prices When it comes to adult BMX bikes, weight, materials, and price are closely related. The lighter the bike, the better the material, and the higher the price. You can expect to pay from $ to $ and up for an adult BMX bike. Inspired by the motocross riding style and dirt jump tracks. From tricks and flips to cruising around town, these BMX bikes are all about action. Made with lightweight yet rugged frames, our collection of BMX bikes are ready to rip, be it the street, dirt, or the park.