??Lightweight?: This road bike adopts lightweight aluminum alloy frame structure,which reduces the weight of the bicycle and provides a faster speed advantage. ??Smooth Gear Shift?: This mountain bike with 21-speed Shimano speed control, front derailleur, rear derailleur,which enables you to effectively start and operate your driving, smooth shifting and durable. ??Easy to Assemble?: 85% of this bike is assembled when it arrives. You only need to install the front wheels, handlebars, pedals, seats and tire inflation. It is easy to assemble in 15-20 minutes. ??Good Durability?: The wheels are made of alloy rims, which are light in weight and durable.Spoke wheel with good toughness, elasticity and impact resistance. ??High Efficiency?: This road bicycles for men can meet the needs of increasing transmission power easily, doubling the riding efficiency, and bringing an excellent racing experience.