A Thunderbird mountain bike in silver and green with a 26-inch frame. Bicycle details: Frame: Made of aluminum, making it lightweight and durable. Gears: Features 21 speeds to suit different terrains. Brake system: Equipped with front and rear disc brakes for safety. Additional features: Features internal cable design and front suspension system for shock absorption. Note: The bike is new and has been used very little. Asking price: 600