Introducing the CALPALMY 2-Pack Butyl Rubber Fat Tire Tubes, your ultimate solution for replacing inner tubes on fat bikes. Specially designed for mountain bikes and e-bikes, these tubes are compatible with a variety of tire sizes, particularly those measuring 20 inches in diameter and 3.5 to 4 inches in width. The ETRTO size is 100-406, so you can ensure a perfect fit for your bike. Whether you’re an avid cyclist or a casual rider, these replacement tubes will keep you rolling smoothly on your adventures.

Each package contains two high-quality 20×4” fat bike tire inner tubes, crafted from durable butyl rubber. This material is known for its excellent resistance to punctures and wear. The heavy-duty construction means these tubes will last longer, even under demanding conditions. You’ll appreciate the elastic yet robust nature of the rubber, which provides additional suspension for improved shock absorption and vibration control while riding. Say goodbye to uncomfortable rides and hello to a smoother experience.

Installing new inner tubes can often be a cumbersome task, but CALPALMY has made it easier for you. Each pack includes a handy tire lever, which significantly reduces installation time—by up to 50%! This small yet powerful tool allows you to remove and install tires and inner tubes without causing damage to your bike. With the right tools at your disposal, you can spend less time fixing and more time enjoying your ride.

The tubes are equipped with a standard 32mm Schrader valve, which fits most standard rims. This valve type makes inflating your tires a breeze; you can use a regular bike pump to achieve the desired pressure easily. The valve features a 10mm base diameter, ensuring compatibility and ease of use. Always check your tire’s sidewall for specific sizing details and recommended psi to ensure optimal performance.

In conclusion, the CALPALMY 2-Pack Butyl Rubber Fat Tire Tubes are perfect for anyone looking to maintain or upgrade their mountain bike or e-bike. With their robust construction, easy installation, and compatibility with standard rims, you can trust these tubes to deliver a reliable performance every time you hit the trails. Don’t let flat tires hold you back—equip your bike with CALPALMY inner tubes and enjoy the freedom of the ride.