[Lightweight Frame: The road bike is designed for people who like to ride or use it for daily commuting; The aluminum frame is lightweight stiff durable and capable of higher speeds Brake System: The braking system consists of dual caliper brakes which are lighter easier to maintain and last longer than disc brakes giving you the stable and powerful braking force to stop confidently in all conditions Professional Drivetrain: Road bike with 14-speed derailleur drivetrain for a varied riding experience and total control in any situation whether on gravel city streets or other challenging terrain 700C Tires: 700c wheels have less rolling resistance making riding more efficient allowing you to go further and using less energy; Large diameter wheels have better rollover characteristics roll over potholes bumps and other obstacles more easily Assembly And Size Guide: Size S (49 cm) for women and men between 5\3" to 5\6" Size M (53 cm) for rider between 5\6" & 6\ Size L (57 cm) for adult between 6\to 6\4"; 85% pre-assembled easy to assemble free installation tools include]