Schwinn Men's S4094TR Zeno Hybrid Bike, 18"/Medium, Blue Schwinn steel hybrid frame with Schwinn suspension fork offers comfortable and efficient riding 21 speed SRAM twist shifters with Shimano rear derailleur for precise gear shifting Front and rear alloy linear pull brakes stop securely Soft hybrid seat with springs as well as a suspension seat post for the ultimate comfort Alloy rims are strong and lightweight