Schwinn Protocol 1.0 Men's Dual-Suspension Mountain Bike, 26" Wheels Schwinn aluminum full suspension frame with front suspension fork for reliable, responsive riding 24-speed Shimano EZ-Fire trigger shifters and the Shimano rear derailleur provide a wide gear range and smooth shifting out on the trail Front disc brake and rear alloy V-brake combine for crisp all-condition stopping Light and strong alloy rims support knobby mountain tires for durable everyday riding Schwinn alloy crank offers optimal gearing and less pesky maintenance on your end