Premium 20x4.0 Inner Tubes for E-Bikes - Heavy-Duty with Puncture Resistance ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Premium Heavy-Duty Inner Tubes for E-Bikes Introducing the ultimate solution for E-Bike enthusiasts - our Premium 20x4.0 Heavy-Duty Inner Tubes. Built to withstand the demands of modern cycling, these inner tubes provide unmatched performance and reliability. Key Features: Dimensions: 20''x3.5''/4.0" AV32mm (89/102-406) Constructed with high elasticity and premium butyl and EPDM rubber. 40% thicker than standard tubes, enhancing durability and puncture resistance. Improved air tightness - maintains pressure for 6-9 months, reducing inflation frequency by 200% compared to ordinary tubes. Ultra durable with superior shock absorption capabilities for a smoother ride. Compatible with various bike models: mountain bikes, road bikes, cruiser bikes, and electric bikes. The Benefits You Deserve: Prioritize safety with superior puncture resistance and stabilized tire pressure. Enjoy enhanced comfort on your rides due to exceptional shock absorption from heavy-duty materials. Spend less time worrying about tire maintenance with longer-lasting inner tubes. Seamless installation process for hassle-free replacements. Why Choose Our Heavy-Duty Inner Tubes? Elevate your E-Bike experience with our Premium Heavy-Duty Inner Tubes. Designed to excel in demanding conditions, these tubes not only enhance your ride, but also ensure safety and reliability. With their excellent air retention, sturdiness, and compatibility across multiple bike styles, they are the ultimate choice for discerning cyclists. Don?t compromise on your cycling adventures. Invest in our high-quality inner tubes and experience the difference in performance and comfort. Order now and set out on your journeys with confidence! Shipping Free Fast Shipping - We offer free shipping to most of the USA with a normal delivery time of 3-7 days. However, due to the current situation, additional delivery time (up to 3 weeks) may be required for some items. Alternative Carriers - We may use alternative carriers (e.g. USPS, FedEx, UPS, etc.) to ensure your package arrives safely and on time. Due to the use of multiple carriers, we are unable to provide a tracking number automatically. Handling Time - Orders are processed and shipped within 1-2 business days of receiving cleared payment. Shipping Restrictions - Shipping to Alaska, Hawaii, Puerto Rico, Guam, and other US territories may incur shipping charges or delivery restrictions. Please contact us before ordering, or your order can be refunded/cancelled. State Restrictions - There may be restrictions based on your state of purchase. For example, certain items may not be shipped to California due to state regulations. Contact for Tracking Updates - If you require tracking updates or have any concerns about the delivery of your order, please feel free to contact us, and we will be happy to assist you. Return 30-Day Hassle-Free Returns - We want you to be completely satisfied with your purchase. If you are not, you can return the item within 30 days of receiving it for a full refund or exchange. Easy Return Process - To start a return, simply contact us and we will provide you with a prepaid return shipping label and detailed instructions. Restocking Fee - There are no restocking fees for returns. However, the buyer is responsible for return shipping costs if the return is not due to a seller's error. Refund Processing Time - Refunds will be processed within 5 business days of receiving the returned item in its original condition. Payment We accept all major credit cards, PayPal, and Apple Pay for your convenience. Your payment information is secure and encrypted to ensure a safe and seamless transaction. Please complete your payment within 3 days of purchase to avoid any delays in shipping. Feedback Your feedback is extremely important to us. We strive to provide the best products and customer service possible. If you are satisfied with your purchase, please take a moment to leave us a positive review. If you have any concerns or issues with your order, please contact us before leaving negative feedback. We are committed to resolving any problems and ensuring your satisfaction. Contact Us If you have any questions or concerns, please feel free to reach out to our customer support team. You can contact us through the messaging system. We are available Monday to Friday, 9:00 am to 5:00 pm EST, and we will do our best to respond to your inquiry within 24 hours. Buy it now and enjoy a pleasant shopping experience! UPC: Not Set Model: E-Bike Tubes Unit Quantity: 2 Material: Butyl Rubber,EPDM Rubber Set Includes: Inner Tubes Brand: Unbranded Part Type: Tube Wheel Size: 20 in Valve Type: Schrader Tube Size: 20x3.5/4.0 Number of Items: 2 Color: Black Valve Length: 1.57 Inches MPN: Not Set Item Weight: 2.16 lb Country/Region of Manufacture: Not Set Manufacturer Warranty: Not Set Unit Type: lb