Huffy 24" Nighthawk Boys' Mountain Bike, Blue. From uphill paths to smooth terrain, Huffy's 24 mountain bike delivers a great performance ride. The Micro shift index twist shifting system works with the Shimano rear derailleur for consistent performance. Alloy linear pull brakes provide solid control when you stop. The padded saddle is designed for comfort, plus the quick release binder makes it easy to adjust to the right height. The three-piece crank adds durability while the lightweight, weather resistant alloy rims perform well in all conditions. The 24 mountain bike's bright blue color with yellow highlights and black features creates a stylish design.