Designed for intermediate to advanced riders who want to go further and faster on a high performance bike.Suggested rider height range is 5’3”-6’2". 90% pre-assembled,easy to assembl,all required asssembly tools included.You need to install the handlebar,wheels, pedals,seat and pump up the tires. Watch the installation videos before installing the bike and tuning the brake and speed system. 14-speed drivetrain offers a wide gear range & responsive shifting for varying terrain.BB8 aluminum alloy bikes disc brakes provide solid braking in all conditions Lightweight road bikes frame for men provides optimal comfort wherever your adventure takes you Chainset: carbon 42*52*170 aluminum alloy big fish handle.Pedals:Non-slip all-aluminum specialized bicycle pedals, Brakes: bicycle with BB8 aluminum alloy disc brakes