Upgrade your e-bike with this durable 20 x 4 fat inner tube designed specifically for electric bicycles. Made from high-quality materials, this inner tube ensures a smooth and comfortable ride. Its thick construction can withstand the added weight and power of an e-bike, providing reliable performance and minimizing the risk of flats. With its generous 4-inch width, this inner tube fits perfectly inside fat tires, offering excellent traction and stability on various terrains. Whether you're tackling city streets or exploring off-road trails, this inner tube is an essential component for maintaining the optimal performance of your e-bike and foldable e- bike.