The Next PX 4.0 24" Mountain Bike is a great full suspension bike. The frame of this black 24" Next Bike is designed to handle the toughest trails, or enjoy cruising with friends or family. This Next Mountain Bike for boys features a Shimano 18-speed drive train and easy to use grip index shifters. The black 24" Next Bike is equipped with V-brakes for added safety. In addition, the Next PX 4.0 24" Mountain Bike is easy to assemble means that boys will be out on the trail in no time.