Universal Fit: Our bike pannier bag is carefully designed to fit a wide range of bicycles, including most road bikes and mountain bikes. Whether you're cruising on a sleek road bike or tackling trails on a sturdy mountain bike, our bag's adjustable straps and versatile design ensure a secure and comfortable fit. About This Products: Our bicycle bag is crafted with waterproof materials that ensure your belongings remain safe and dry, even on the most unpredictable rides. The bag's exterior is made from durable polyester, PVC, and PU, expertly woven to provide a robust and long-lasting design. Stylish Design: Our Bike Frame Bag features a built-in phone holder that keeps your device secure and within easy reach while cycling. The holder is designed to accommodate a wide range of phone sizes, ensuring a snug and stable fit for your device. Easy to Install: Our bike rack bag is designed to fit a wide range of road bikes and mountain bikes, making it the good accessory for cyclists of all levels. The adjustable straps ensure a secure and customizable fit, allowing you to easily install the bag on your bike's rear rack. Package Item: 1 Pc Bike Pannier Bag