Schwinn Men's Axios 700c Drop Bar Road Bicycle, Silver/Black/Green, 21.5-Inch Frame/55CM Schwinn aluminum road frame with rigid fork for quick agile riding Shimano 14 speed rear derailleur with Shimano A050 shifters Alloy rims are lightweight and strong, front quick release Alloy caliper road brakes for great breaking power SR Suntour alloy crank for wide gear range