This listing is for a Specialized Hotrock Street kids' bicycle. It features an aluminum frame, making it lightweight and durable. Just installed a new right speed shifter, and brake levers, and gave it a tune up. The bike is in good condition, showing some signs of use typical for a pre-owned children's bike. 21 speed Shimano drivetrain. Smooth tires for faster pavement speeds. Good tubes and tires with sealant. It's a great option for a young rider looking for a reliable and comfortable bike for street and light trail use.